64655976 has 128 divisors (see below), whose sum is σ = 205286400. Its totient is φ = 16481280.

The previous prime is 64655971. The next prime is 64655999. The reversal of 64655976 is 67955646.

64655976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (1360800) is a multiple of the sum of its prime divisors (675).

It is not an unprimeable number, because it can be changed into a prime (64655971) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 108736 + ... + 109328.

It is an arithmetic number, because the mean of its divisors is an integer number (1603800).

Almost surely, 2^64655976 is an apocalyptic number.

64655976 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64655976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102643200).

64655976 is an abundant number, since it is smaller than the sum of its proper divisors (140630424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64655976 is a wasteful number, since it uses less digits than its factorization.

64655976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 675 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 48.

The square root of 64655976 is about 8040.8939801492. The cubic root of 64655976 is about 401.3619739705.

The spelling of 64655976 in words is "sixty-four million, six hundred fifty-five thousand, nine hundred seventy-six".