813354666680 has 32 divisors (see below), whose sum is σ = 1868985195840. Its totient is φ = 318419698560.

The previous prime is 813354666679. The next prime is 813354666731. The reversal of 813354666680 is 86666453318.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216315851 + ... + 216319610.

It is an arithmetic number, because the mean of its divisors is an integer number (58405787370).

Almost surely, 2^813354666680 is an apocalyptic number.

It is an amenable number.

813354666680 is an abundant number, since it is smaller than the sum of its proper divisors (1055630529160).

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

813354666680 is a wasteful number, since it uses less digits than its factorization.

813354666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432635519 (or 432635515 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 56.

The spelling of 813354666680 in words is "eight hundred thirteen billion, three hundred fifty-four million, six hundred sixty-six thousand, six hundred eighty".