64861677 has 12 divisors (see below), whose sum is σ = 93766140. Its totient is φ = 43205568.

The previous prime is 64861651. The next prime is 64861697. The reversal of 64861677 is 77616846.

64861677 is a `hidden beast` number, since 6 + 486 + 167 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35928036 + 28933641 = 5994^2 + 5379^2 .

It is not a de Polignac number, because 64861677 - 2¹⁸ = 64599533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64861627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13273 + ... + 17489.

It is an arithmetic number, because the mean of its divisors is an integer number (7813845).

Almost surely, 2^64861677 is an apocalyptic number.

It is an amenable number.

64861677 is a deficient number, since it is larger than the sum of its proper divisors (28904463).

64861677 is a wasteful number, since it uses less digits than its factorization.

64861677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932 (or 5929 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 64861677 is about 8053.6747513169. The cubic root of 64861677 is about 401.7871636401.

The spelling of 64861677 in words is "sixty-four million, eight hundred sixty-one thousand, six hundred seventy-seven".