167996866 has 4 divisors (see below), whose sum is σ = 251995302. Its totient is φ = 83998432.

The previous prime is 167996849. The next prime is 167996891. The reversal of 167996866 is 668699761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158231241 + 9765625 = 12579^2 + 3125^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 167996866.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41999215 + ... + 41999218.

Almost surely, 2^167996866 is an apocalyptic number.

167996866 is a deficient number, since it is larger than the sum of its proper divisors (83998436).

167996866 is an equidigital number, since it uses as much as digits as its factorization.

167996866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83998435.

The product of its digits is 5878656, while the sum is 58.

The square root of 167996866 is about 12961.3604995772. The cubic root of 167996866 is about 551.7814041166.

The spelling of 167996866 in words is "one hundred sixty-seven million, nine hundred ninety-six thousand, eight hundred sixty-six".