166616412 has 24 divisors (see below), whose sum is σ = 389396112. Its totient is φ = 55449600.

The previous prime is 166616399. The next prime is 166616423. The reversal of 166616412 is 214616661.

It is a happy number.

It is a super-2 number, since 2×166616412² = 55522057495507488, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 18522.

It is an arithmetic number, because the mean of its divisors is an integer number (16224838).

Almost surely, 2^166616412 is an apocalyptic number.

166616412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166616412 is an abundant number, since it is smaller than the sum of its proper divisors (222779700).

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

166616412 is a wasteful number, since it uses less digits than its factorization.

166616412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22309 (or 22307 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 166616412 is about 12907.9979857451. The cubic root of 166616412 is about 550.2658901710.

The spelling of 166616412 in words is "one hundred sixty-six million, six hundred sixteen thousand, four hundred twelve".