86877799721 has 8 divisors (see below), whose sum is σ = 88929873120. Its totient is φ = 84827165472.

The previous prime is 86877799663. The next prime is 86877799727. The reversal of 86877799721 is 12799777868.

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

It is a cyclic number.

It is not a de Polignac number, because 86877799721 - 2³⁰ = 85804057897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86877799727) 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, 237140 + ... + 479573.

It is an arithmetic number, because the mean of its divisors is an integer number (11116234140).

Almost surely, 2^86877799721 is an apocalyptic number.

It is an amenable number.

86877799721 is a deficient number, since it is larger than the sum of its proper divisors (2052073399).

86877799721 is a wasteful number, since it uses less digits than its factorization.

86877799721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719575.

The product of its digits is 149361408, while the sum is 71.

The spelling of 86877799721 in words is "eighty-six billion, eight hundred seventy-seven million, seven hundred ninety-nine thousand, seven hundred twenty-one".