166389616 has 20 divisors (see below), whose sum is σ = 322722400. Its totient is φ = 83106432.

The previous prime is 166389581. The next prime is 166389653. The reversal of 166389616 is 616983661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11620 + ... + 21628.

It is an arithmetic number, because the mean of its divisors is an integer number (16136120).

Almost surely, 2^166389616 is an apocalyptic number.

166389616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166389616 is a deficient number, since it is larger than the sum of its proper divisors (156332784).

166389616 is a wasteful number, since it uses less digits than its factorization.

166389616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056 (or 11050 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 166389616 is about 12899.2098982845. The cubic root of 166389616 is about 550.0161053135.

The spelling of 166389616 in words is "one hundred sixty-six million, three hundred eighty-nine thousand, six hundred sixteen".