166540620 has 48 divisors (see below), whose sum is σ = 482398560. Its totient is φ = 42878976.

The previous prime is 166540613. The next prime is 166540639. The reversal of 166540620 is 26045661.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 46117 + ... + 49596.

It is an arithmetic number, because the mean of its divisors is an integer number (10049970).

Almost surely, 2^166540620 is an apocalyptic number.

166540620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166540620 is an abundant number, since it is smaller than the sum of its proper divisors (315857940).

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

166540620 is a wasteful number, since it uses less digits than its factorization.

166540620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95754 (or 95752 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 166540620 is about 12905.0617976048. The cubic root of 166540620 is about 550.1824408531.

The spelling of 166540620 in words is "one hundred sixty-six million, five hundred forty thousand, six hundred twenty".