64682687 has 4 divisors (see below), whose sum is σ = 64733856. Its totient is φ = 64631520.

The previous prime is 64682663. The next prime is 64682689. The reversal of 64682687 is 78628646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64682687 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 (64682689) 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, 23639 + ... + 26232.

It is an arithmetic number, because the mean of its divisors is an integer number (16183464).

Almost surely, 2^64682687 is an apocalyptic number.

64682687 is a deficient number, since it is larger than the sum of its proper divisors (51169).

64682687 is a wasteful number, since it uses less digits than its factorization.

64682687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51168.

The product of its digits is 774144, while the sum is 47.

The square root of 64682687 is about 8042.5547557974. The cubic root of 64682687 is about 401.4172372493.

The spelling of 64682687 in words is "sixty-four million, six hundred eighty-two thousand, six hundred eighty-seven".