166144436 has 48 divisors (see below), whose sum is σ = 315490560. Its totient is φ = 76308480.

The previous prime is 166144427. The next prime is 166144477. The reversal of 166144436 is 634441661.

It is a happy number.

It is a super-2 number, since 2×166144436² = 55207947227516192, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166144396 and 166144405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689276 + ... + 689516.

It is an arithmetic number, because the mean of its divisors is an integer number (6572720).

Almost surely, 2^166144436 is an apocalyptic number.

It is an amenable number.

166144436 is a deficient number, since it is larger than the sum of its proper divisors (149346124).

166144436 is a wasteful number, since it uses less digits than its factorization.

166144436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 502 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 166144436 is about 12889.7027118549. The cubic root of 166144436 is about 549.7458175339.

The spelling of 166144436 in words is "one hundred sixty-six million, one hundred forty-four thousand, four hundred thirty-six".