64663745 has 16 divisors (see below), whose sum is σ = 81881280. Its totient is φ = 48888000.

The previous prime is 64663673. The next prime is 64663759. The reversal of 64663745 is 54736646.

64663745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64663745 - 2²² = 60469441 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66110 + ... + 67080.

It is an arithmetic number, because the mean of its divisors is an integer number (5117580).

Almost surely, 2^64663745 is an apocalyptic number.

It is an amenable number.

64663745 is a deficient number, since it is larger than the sum of its proper divisors (17217535).

64663745 is a wasteful number, since it uses less digits than its factorization.

64663745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696.

The product of its digits is 362880, while the sum is 41.

The square root of 64663745 is about 8041.3770586884. The cubic root of 64663745 is about 401.3780490832.

The spelling of 64663745 in words is "sixty-four million, six hundred sixty-three thousand, seven hundred forty-five".