64624705 has 8 divisors (see below), whose sum is σ = 77598504. Its totient is φ = 51667200.

The previous prime is 64624639. The next prime is 64624709. The reversal of 64624705 is 50742646.

It can be written as a sum of positive squares in 4 ways, for example, as 368449 + 64256256 = 607^2 + 8016^2 .

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

It is not a de Polignac number, because 64624705 - 2¹⁹ = 64100417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64624709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7815 + ... + 13795.

It is an arithmetic number, because the mean of its divisors is an integer number (9699813).

Almost surely, 2^64624705 is an apocalyptic number.

It is an amenable number.

64624705 is a deficient number, since it is larger than the sum of its proper divisors (12973799).

64624705 is a wasteful number, since it uses less digits than its factorization.

64624705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8147.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 64624705 is about 8038.9492472586. The cubic root of 64624705 is about 401.2972570124.

The spelling of 64624705 in words is "sixty-four million, six hundred twenty-four thousand, seven hundred five".