80661170826 has 48 divisors (see below), whose sum is σ = 180501688224. Its totient is φ = 26016312672.

The previous prime is 80661170809. The next prime is 80661170857. The reversal of 80661170826 is 62807116608.

It is a happy number.

80661170826 is a `hidden beast` number, since 8 + 0 + 6 + 611 + 7 + 0 + 8 + 26 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404161 + ... + 569796.

It is an arithmetic number, because the mean of its divisors is an integer number (3760451838).

Almost surely, 2^80661170826 is an apocalyptic number.

80661170826 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

80661170826 is an abundant number, since it is smaller than the sum of its proper divisors (99840517398).

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

80661170826 is a wasteful number, since it uses less digits than its factorization.

80661170826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974115 (or 974112 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 80661170826 in words is "eighty billion, six hundred sixty-one million, one hundred seventy thousand, eight hundred twenty-six".