65616506 has 4 divisors (see below), whose sum is σ = 98424762. Its totient is φ = 32808252.

The previous prime is 65616497. The next prime is 65616547. The reversal of 65616506 is 60561656.

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

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 410881 = 8075^2 + 641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16404125 + ... + 16404128.

Almost surely, 2^65616506 is an apocalyptic number.

65616506 is a deficient number, since it is larger than the sum of its proper divisors (32808256).

65616506 is a wasteful number, since it uses less digits than its factorization.

65616506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32808255.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 65616506 is about 8100.4015949828. The cubic root of 65616506 is about 403.3397582627.

It can be divided in two parts, 6561650 and 6, that added together give a palindrome (6561656).

The spelling of 65616506 in words is "sixty-five million, six hundred sixteen thousand, five hundred six".