166505650 has 96 divisors (see below), whose sum is σ = 347120640. Its totient is φ = 59136000.

The previous prime is 166505639. The next prime is 166505663. The reversal of 166505650 is 56505661.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1870806 + ... + 1870894.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^166505650 is an apocalyptic number.

166505650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166505650 is an abundant number, since it is smaller than the sum of its proper divisors (180614990).

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

166505650 is a wasteful number, since it uses less digits than its factorization.

166505650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 166505650 is about 12903.7068317596. The cubic root of 166505650 is about 550.1439292741.

The spelling of 166505650 in words is "one hundred sixty-six million, five hundred five thousand, six hundred fifty".