80661305355 has 16 divisors (see below), whose sum is σ = 129062881824. Its totient is φ = 43017765120.

The previous prime is 80661305297. The next prime is 80661305393. The reversal of 80661305355 is 55350316608.

It is a happy number.

It is not a de Polignac number, because 80661305355 - 2¹⁴ = 80661288971 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397335 + ... + 564975.

It is an arithmetic number, because the mean of its divisors is an integer number (8066430114).

Almost surely, 2^80661305355 is an apocalyptic number.

80661305355 is a deficient number, since it is larger than the sum of its proper divisors (48401576469).

80661305355 is a wasteful number, since it uses less digits than its factorization.

80661305355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199726.

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 80661305355 in words is "eighty billion, six hundred sixty-one million, three hundred five thousand, three hundred fifty-five".