64936678 has 4 divisors (see below), whose sum is σ = 97405020. Its totient is φ = 32468338.

The previous prime is 64936643. The next prime is 64936679. The reversal of 64936678 is 87663946.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64936679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16234168 + ... + 16234171.

It is an arithmetic number, because the mean of its divisors is an integer number (24351255).

Almost surely, 2^64936678 is an apocalyptic number.

64936678 is a deficient number, since it is larger than the sum of its proper divisors (32468342).

64936678 is a wasteful number, since it uses less digits than its factorization.

64936678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32468341.

The product of its digits is 1306368, while the sum is 49.

The square root of 64936678 is about 8058.3297276793. The cubic root of 64936678 is about 401.9419691321.

The spelling of 64936678 in words is "sixty-four million, nine hundred thirty-six thousand, six hundred seventy-eight".