69664977912 has 128 divisors (see below), whose sum is σ = 182657617920. Its totient is φ = 22114176000.

The previous prime is 69664977911. The next prime is 69664977919. The reversal of 69664977912 is 21977946696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69664977911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40198198 + ... + 40199930.

It is an arithmetic number, because the mean of its divisors is an integer number (1427012640).

Almost surely, 2^69664977912 is an apocalyptic number.

69664977912 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69664977912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91328808960).

69664977912 is an abundant number, since it is smaller than the sum of its proper divisors (112992640008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69664977912 is a wasteful number, since it uses less digits than its factorization.

69664977912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605 (or 2601 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 66.

The spelling of 69664977912 in words is "sixty-nine billion, six hundred sixty-four million, nine hundred seventy-seven thousand, nine hundred twelve".