64678755 has 16 divisors (see below), whose sum is σ = 108933120. Its totient is φ = 32679648.

The previous prime is 64678723. The next prime is 64678759. The reversal of 64678755 is 55787646.

It is not a de Polignac number, because 64678755 - 2⁵ = 64678723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64678759) 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, 113187 + ... + 113756.

It is an arithmetic number, because the mean of its divisors is an integer number (6808320).

Almost surely, 2^64678755 is an apocalyptic number.

64678755 is a deficient number, since it is larger than the sum of its proper divisors (44254365).

64678755 is a wasteful number, since it uses less digits than its factorization.

64678755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226970.

The product of its digits is 1411200, while the sum is 48.

The square root of 64678755 is about 8042.3103023945. The cubic root of 64678755 is about 401.4091031585.

It can be divided in two parts, 646 and 78755, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 64678755 in words is "sixty-four million, six hundred seventy-eight thousand, seven hundred fifty-five".