65655657 has 8 divisors (see below), whose sum is σ = 97267680. Its totient is φ = 43770420.

The previous prime is 65655641. The next prime is 65655661. The reversal of 65655657 is 75655656.

It is not a de Polignac number, because 65655657 - 2⁴ = 65655641 is a prime.

It is a super-2 number, since 2×65655657² = 8621330592203298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65655607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215819 + ... + 1215872.

It is an arithmetic number, because the mean of its divisors is an integer number (12158460).

Almost surely, 2^65655657 is an apocalyptic number.

It is an amenable number.

65655657 is a deficient number, since it is larger than the sum of its proper divisors (31612023).

65655657 is a wasteful number, since it uses less digits than its factorization.

65655657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431700 (or 2431694 counting only the distinct ones).

The product of its digits is 945000, while the sum is 45.

The square root of 65655657 is about 8102.8178431950. The cubic root of 65655657 is about 403.4199617369.

Subtracting 65655657 from its reverse (75655656), we obtain a palindrome (9999999).

The spelling of 65655657 in words is "sixty-five million, six hundred fifty-five thousand, six hundred fifty-seven".