997666944 has 32 divisors (see below), whose sum is σ = 2650053840. Its totient is φ = 332555520.

The previous prime is 997666939. The next prime is 997666963. The reversal of 997666944 is 449666799.

It is a tau number, because it is divible by the number of its divisors (32).

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, 1298662 + ... + 1299429.

Almost surely, 2^997666944 is an apocalyptic number.

It is an amenable number.

997666944 is an abundant number, since it is smaller than the sum of its proper divisors (1652386896).

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

997666944 is a wasteful number, since it uses less digits than its factorization.

997666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598108 (or 2598096 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 60.

The square root of 997666944 is about 31585.8662062638. The cubic root of 997666944 is about 999.2217090871.

The spelling of 997666944 in words is "nine hundred ninety-seven million, six hundred sixty-six thousand, nine hundred forty-four".