64672028686 has 8 divisors (see below), whose sum is σ = 97014055320. Its totient is φ = 32334010248.

The previous prime is 64672028669. The next prime is 64672028693. The reversal of 64672028686 is 68682027646.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961381 + ... + 1026448.

It is an arithmetic number, because the mean of its divisors is an integer number (12126756915).

Almost surely, 2^64672028686 is an apocalyptic number.

64672028686 is a deficient number, since it is larger than the sum of its proper divisors (32342026634).

64672028686 is a wasteful number, since it uses less digits than its factorization.

64672028686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004098.

The product of its (nonzero) digits is 9289728, while the sum is 55.

It can be divided in two parts, 6467 and 2028686, that added together give a triangular number (2035153 = T₂₀₁₇).

The spelling of 64672028686 in words is "sixty-four billion, six hundred seventy-two million, twenty-eight thousand, six hundred eighty-six".