891334664 has 16 divisors (see below), whose sum is σ = 1823184720. Its totient is φ = 405152080.

The previous prime is 891334657. The next prime is 891334679. The reversal of 891334664 is 466433198.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5064314 + ... + 5064489.

It is an arithmetic number, because the mean of its divisors is an integer number (113949045).

Almost surely, 2^891334664 is an apocalyptic number.

It is an amenable number.

891334664 is an abundant number, since it is smaller than the sum of its proper divisors (931850056).

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

891334664 is a wasteful number, since it uses less digits than its factorization.

891334664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10128820 (or 10128816 counting only the distinct ones).

The product of its digits is 373248, while the sum is 44.

The square root of 891334664 is about 29855.2284198262. The cubic root of 891334664 is about 962.3807604914.

The spelling of 891334664 in words is "eight hundred ninety-one million, three hundred thirty-four thousand, six hundred sixty-four".