64678957 has 8 divisors (see below), whose sum is σ = 74074496. Its totient is φ = 55322352.

The previous prime is 64678951. The next prime is 64678969. The reversal of 64678957 is 75987646.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64678957 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 (64678951) 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, 6078 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (9259312).

Almost surely, 2^64678957 is an apocalyptic number.

It is an amenable number.

64678957 is a deficient number, since it is larger than the sum of its proper divisors (9395539).

64678957 is a wasteful number, since it uses less digits than its factorization.

64678957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19467.

The product of its digits is 2540160, while the sum is 52.

The square root of 64678957 is about 8042.3228609650. The cubic root of 64678957 is about 401.4095210420.

The spelling of 64678957 in words is "sixty-four million, six hundred seventy-eight thousand, nine hundred fifty-seven".