64626605 has 16 divisors (see below), whose sum is σ = 84337200. Its totient is φ = 47342592.

The previous prime is 64626589. The next prime is 64626607. The reversal of 64626605 is 50662646.

It can be written as a sum of positive squares in 8 ways, for example, as 22259524 + 42367081 = 4718^2 + 6509^2 .

It is a cyclic number.

It is not a de Polignac number, because 64626605 - 2⁴ = 64626589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64626607) 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, 7130 + ... + 13419.

It is an arithmetic number, because the mean of its divisors is an integer number (5271075).

Almost surely, 2^64626605 is an apocalyptic number.

It is an amenable number.

64626605 is a deficient number, since it is larger than the sum of its proper divisors (19710595).

64626605 is a wasteful number, since it uses less digits than its factorization.

64626605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20608.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 64626605 is about 8039.0674210383. The cubic root of 64626605 is about 401.3011897567.

The spelling of 64626605 in words is "sixty-four million, six hundred twenty-six thousand, six hundred five".