166440612 has 96 divisors (see below), whose sum is σ = 436731904. Its totient is φ = 48988800.

The previous prime is 166440601. The next prime is 166440623. The reversal of 166440612 is 216044661.

It is an interprime number because it is at equal distance from previous prime (166440601) and next prime (166440623).

It is a self number, because there is not a number n which added to its sum of digits gives 166440612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 614037 + ... + 614307.

Almost surely, 2^166440612 is an apocalyptic number.

166440612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166440612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218365952).

166440612 is an abundant number, since it is smaller than the sum of its proper divisors (270291292).

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

166440612 is a wasteful number, since it uses less digits than its factorization.

166440612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 166440612 is about 12901.1864570667. The cubic root of 166440612 is about 550.0722902225.

The spelling of 166440612 in words is "one hundred sixty-six million, four hundred forty thousand, six hundred twelve".