64945677 has 8 divisors (see below), whose sum is σ = 86638464. Its totient is φ = 43275008.

The previous prime is 64945649. The next prime is 64945679. The reversal of 64945677 is 77654946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64945677 - 2⁷ = 64945549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64945679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3373 + ... + 11885.

It is an arithmetic number, because the mean of its divisors is an integer number (10829808).

Almost surely, 2^64945677 is an apocalyptic number.

It is an amenable number.

64945677 is a deficient number, since it is larger than the sum of its proper divisors (21692787).

64945677 is a wasteful number, since it uses less digits than its factorization.

64945677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059.

The product of its digits is 1270080, while the sum is 48.

The square root of 64945677 is about 8058.8880746664. Note that the first 3 decimals coincide. The cubic root of 64945677 is about 401.9605354690.

The spelling of 64945677 in words is "sixty-four million, nine hundred forty-five thousand, six hundred seventy-seven".