64878877 has 16 divisors (see below), whose sum is σ = 77635584. Its totient is φ = 53046000.

The previous prime is 64878841. The next prime is 64878889. The reversal of 64878877 is 77887846.

It is a happy number.

It is not a de Polignac number, because 64878877 - 2¹¹ = 64876829 is a prime.

It is a super-2 number, since 2×64878877² = 8418537361562258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64879877) 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, 13302 + ... + 17512.

It is an arithmetic number, because the mean of its divisors is an integer number (4852224).

Almost surely, 2^64878877 is an apocalyptic number.

It is an amenable number.

64878877 is a deficient number, since it is larger than the sum of its proper divisors (12756707).

64878877 is a wasteful number, since it uses less digits than its factorization.

64878877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320.

The product of its digits is 4214784, while the sum is 55.

The square root of 64878877 is about 8054.7425160585. The cubic root of 64878877 is about 401.8226757676.

The spelling of 64878877 in words is "sixty-four million, eight hundred seventy-eight thousand, eight hundred seventy-seven".