816854107966 has 32 divisors (see below), whose sum is σ = 1383152668128. Its totient is φ = 359260392960.

The previous prime is 816854107859. The next prime is 816854108003. The reversal of 816854107966 is 669701458618.

It is a happy number.

816854107966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 8864391 + ... + 8956066.

It is an arithmetic number, because the mean of its divisors is an integer number (43223520879).

Almost surely, 2^816854107966 is an apocalyptic number.

816854107966 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

816854107966 is a deficient number, since it is larger than the sum of its proper divisors (566298560162).

816854107966 is a wasteful number, since it uses less digits than its factorization.

816854107966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17820556.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 816854107966 in words is "eight hundred sixteen billion, eight hundred fifty-four million, one hundred seven thousand, nine hundred sixty-six".