70651 has 4 divisors (see below), whose sum is σ = 80752. Its totient is φ = 60552.

The previous prime is 70639. The next prime is 70657. The reversal of 70651 is 15607.

70651 = 106² + 107² + ... + 111².

70651 is nontrivially palindromic in base 6.

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

It is a cyclic number.

It is not a de Polignac number, because 70651 - 2⁵ = 70619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5040 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (20188).

2⁷⁰⁶⁵¹ is an apocalyptic number.

70651 is a deficient number, since it is larger than the sum of its proper divisors (10101).

70651 is a wasteful number, since it uses less digits than its factorization.

70651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 70651 is about 265.8025583022. The cubic root of 70651 is about 41.3402188205.

It can be divided in two parts, 706 and 51, that added together give a palindrome (757).

The spelling of 70651 in words is "seventy thousand, six hundred fifty-one".