65715651 has 16 divisors (see below), whose sum is σ = 97873920. Its totient is φ = 43577640.

The previous prime is 65715619. The next prime is 65715673. The reversal of 65715651 is 15651756.

It is not a de Polignac number, because 65715651 - 2⁵ = 65715619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65715451) 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 15 ways as a sum of consecutive naturals, for example, 1215 + ... + 11528.

It is an arithmetic number, because the mean of its divisors is an integer number (6117120).

Almost surely, 2^65715651 is an apocalyptic number.

65715651 is a deficient number, since it is larger than the sum of its proper divisors (32158269).

65715651 is a wasteful number, since it uses less digits than its factorization.

65715651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12943 (or 12937 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 65715651 is about 8106.5190433379. The cubic root of 65715651 is about 403.5428016674.

It can be divided in two parts, 65715 and 651, that added together give a palindrome (66366).

The spelling of 65715651 in words is "sixty-five million, seven hundred fifteen thousand, six hundred fifty-one".