166403616 has 48 divisors (see below), whose sum is σ = 462508704. Its totient is φ = 52204544.

The previous prime is 166403609. The next prime is 166403639. The reversal of 166403616 is 616304661.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49350 + ... + 52613.

It is an arithmetic number, because the mean of its divisors is an integer number (9635598).

Almost surely, 2^166403616 is an apocalyptic number.

166403616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166403616 is an abundant number, since it is smaller than the sum of its proper divisors (296105088).

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

166403616 is a wasteful number, since it uses less digits than its factorization.

166403616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101993 (or 101985 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 166403616 is about 12899.7525557663. The cubic root of 166403616 is about 550.0315309747.

The spelling of 166403616 in words is "one hundred sixty-six million, four hundred three thousand, six hundred sixteen".