65605501 has 4 divisors (see below), whose sum is σ = 70652092. Its totient is φ = 60558912.

The previous prime is 65605489. The next prime is 65605513. The reversal of 65605501 is 10550656.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (65605489) and next prime (65605513).

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 59305401 = 2510^2 + 7701^2 .

It is a cyclic number.

It is not a de Polignac number, because 65605501 - 2²¹ = 63508349 is a prime.

It is a super-2 number, since 2×65605501² = 8608163522922002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65605501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65605301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2523276 + ... + 2523301.

It is an arithmetic number, because the mean of its divisors is an integer number (17663023).

Almost surely, 2^65605501 is an apocalyptic number.

It is an amenable number.

65605501 is a deficient number, since it is larger than the sum of its proper divisors (5046591).

65605501 is a wasteful number, since it uses less digits than its factorization.

65605501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046590.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 65605501 is about 8099.7222791896. The cubic root of 65605501 is about 403.3172080311.

The spelling of 65605501 in words is "sixty-five million, six hundred five thousand, five hundred one".