65656407 has 8 divisors (see below), whose sum is σ = 87909120. Its totient is φ = 43587320.

The previous prime is 65656391. The next prime is 65656427. The reversal of 65656407 is 70465656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65656407 - 2⁴ = 65656391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65656427) 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 7 ways as a sum of consecutive naturals, for example, 45069 + ... + 46502.

It is an arithmetic number, because the mean of its divisors is an integer number (10988640).

Almost surely, 2^65656407 is an apocalyptic number.

65656407 is a deficient number, since it is larger than the sum of its proper divisors (22252713).

65656407 is a wasteful number, since it uses less digits than its factorization.

65656407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91813.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 65656407 is about 8102.8641232591. The cubic root of 65656407 is about 403.4214978514.

Subtracting 65656407 from its reverse (70465656), we obtain a square (4809249 = 2193²).

The spelling of 65656407 in words is "sixty-five million, six hundred fifty-six thousand, four hundred seven".