64566655 has 12 divisors (see below), whose sum is σ = 81774792. Its totient is φ = 48933360.

The previous prime is 64566653. The next prime is 64566659. The reversal of 64566655 is 55666546.

It is not a de Polignac number, because 64566655 - 2¹ = 64566653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64566653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16081 + ... + 19690.

It is an arithmetic number, because the mean of its divisors is an integer number (6814566).

Almost surely, 2^64566655 is an apocalyptic number.

64566655 is a deficient number, since it is larger than the sum of its proper divisors (17208137).

64566655 is a wasteful number, since it uses less digits than its factorization.

64566655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35814 (or 35795 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The square root of 64566655 is about 8035.3378895974. The cubic root of 64566655 is about 401.1770641525.

The spelling of 64566655 in words is "sixty-four million, five hundred sixty-six thousand, six hundred fifty-five".