997863166 has 16 divisors (see below), whose sum is σ = 1614004560. Its totient is φ = 461142720.

The previous prime is 997863137. The next prime is 997863169. The reversal of 997863166 is 661368799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997863169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318681 + ... + 321796.

It is an arithmetic number, because the mean of its divisors is an integer number (100875285).

Almost surely, 2^997863166 is an apocalyptic number.

997863166 is a deficient number, since it is larger than the sum of its proper divisors (616141394).

997863166 is a wasteful number, since it uses less digits than its factorization.

997863166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640539.

The product of its digits is 2939328, while the sum is 55.

The square root of 997863166 is about 31588.9722213307. The cubic root of 997863166 is about 999.2872140569.

The spelling of 997863166 in words is "nine hundred ninety-seven million, eight hundred sixty-three thousand, one hundred sixty-six".