64578677 has 4 divisors (see below), whose sum is σ = 65071776. Its totient is φ = 64085580.

The previous prime is 64578671. The next prime is 64578707. The reversal of 64578677 is 77687546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64578677 - 2¹⁴ = 64562293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64578671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246353 + ... + 246614.

It is an arithmetic number, because the mean of its divisors is an integer number (16267944).

Almost surely, 2^64578677 is an apocalyptic number.

It is an amenable number.

64578677 is a deficient number, since it is larger than the sum of its proper divisors (493099).

64578677 is a wasteful number, since it uses less digits than its factorization.

64578677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493098.

The product of its digits is 1975680, while the sum is 50.

The square root of 64578677 is about 8036.0859253744. The cubic root of 64578677 is about 401.2019616859.

The spelling of 64578677 in words is "sixty-four million, five hundred seventy-eight thousand, six hundred seventy-seven".