166398412 has 6 divisors (see below), whose sum is σ = 291197228. Its totient is φ = 83199204.

The previous prime is 166398403. The next prime is 166398437. The reversal of 166398412 is 214893661.

166398412 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166398412² = 55376863032243488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20799798 + ... + 20799805.

Almost surely, 2^166398412 is an apocalyptic number.

It is an amenable number.

166398412 is a deficient number, since it is larger than the sum of its proper divisors (124798816).

166398412 is a wasteful number, since it uses less digits than its factorization.

166398412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41599607 (or 41599605 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 166398412 is about 12899.5508448938. The cubic root of 166398412 is about 550.0257971371.

The spelling of 166398412 in words is "one hundred sixty-six million, three hundred ninety-eight thousand, four hundred twelve".