80666813400 has 48 divisors (see below), whose sum is σ = 250067123400. Its totient is φ = 21511150080.

The previous prime is 80666813399. The next prime is 80666813417. The reversal of 80666813400 is 431866608.

It is a happy number.

It is a super-2 number, since 2×80666813400² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67221745 + ... + 67222944.

Almost surely, 2^80666813400 is an apocalyptic number.

It is an amenable number.

80666813400 is an abundant number, since it is smaller than the sum of its proper divisors (169400310000).

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

80666813400 is a wasteful number, since it uses less digits than its factorization.

80666813400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134444708 (or 134444699 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 80666813400 in words is "eighty billion, six hundred sixty-six million, eight hundred thirteen thousand, four hundred".