64877377 has 2 divisors, whose sum is σ = 64877378. Its totient is φ = 64877376.

The previous prime is 64877369. The next prime is 64877387. The reversal of 64877377 is 77377846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59536656 + 5340721 = 7716^2 + 2311^2 .

It is a cyclic number.

It is not a de Polignac number, because 64877377 - 2³ = 64877369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64877377.

It is not a weakly prime, because it can be changed into another prime (64877387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32438688 + 32438689.

It is an arithmetic number, because the mean of its divisors is an integer number (32438689).

Almost surely, 2^64877377 is an apocalyptic number.

It is an amenable number.

64877377 is a deficient number, since it is larger than the sum of its proper divisors (1).

64877377 is an equidigital number, since it uses as much as digits as its factorization.

64877377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 49.

The square root of 64877377 is about 8054.6494026742. The cubic root of 64877377 is about 401.8195790296.

The spelling of 64877377 in words is "sixty-four million, eight hundred seventy-seven thousand, three hundred seventy-seven".