64871686 has 8 divisors (see below), whose sum is σ = 106153704. Its totient is φ = 29487120.

The previous prime is 64871671. The next prime is 64871687. The reversal of 64871686 is 68617846.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64871687) 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, 1474335 + ... + 1474378.

It is an arithmetic number, because the mean of its divisors is an integer number (13269213).

Almost surely, 2^64871686 is an apocalyptic number.

64871686 is a deficient number, since it is larger than the sum of its proper divisors (41282018).

64871686 is a wasteful number, since it uses less digits than its factorization.

64871686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948726.

The product of its digits is 387072, while the sum is 46.

The square root of 64871686 is about 8054.2961207048. The cubic root of 64871686 is about 401.8078295714.

The spelling of 64871686 in words is "sixty-four million, eight hundred seventy-one thousand, six hundred eighty-six".