64975881 has 16 divisors (see below), whose sum is σ = 89481920. Its totient is φ = 41912640.

The previous prime is 64975879. The next prime is 64975891. The reversal of 64975881 is 18857946.

It is not a de Polignac number, because 64975881 - 2¹ = 64975879 is a prime.

It is a super-2 number, since 2×64975881² = 8443730223452322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64975881.

It is not an unprimeable number, because it can be changed into a prime (64975891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11751 + ... + 16371.

It is an arithmetic number, because the mean of its divisors is an integer number (5592620).

Almost surely, 2^64975881 is an apocalyptic number.

It is an amenable number.

64975881 is a deficient number, since it is larger than the sum of its proper divisors (24506039).

64975881 is a wasteful number, since it uses less digits than its factorization.

64975881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4776.

The product of its digits is 483840, while the sum is 48.

The square root of 64975881 is about 8060.7618126328. The cubic root of 64975881 is about 402.0228384837.

It can be divided in two parts, 64975 and 881, that added together give a palindrome (65856).

The spelling of 64975881 in words is "sixty-four million, nine hundred seventy-five thousand, eight hundred eighty-one".