166651330 has 32 divisors (see below), whose sum is σ = 321490944. Its totient is φ = 62035776.

The previous prime is 166651297. The next prime is 166651349. The reversal of 166651330 is 33156661.

166651330 = 1637² + 1638² + ... + 1696².

It is a junction number, because it is equal to n+sod(n) for n = 166651292 and 166651301.

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, 1282 + ... + 18301.

It is an arithmetic number, because the mean of its divisors is an integer number (10046592).

Almost surely, 2^166651330 is an apocalyptic number.

166651330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166651330 is a deficient number, since it is larger than the sum of its proper divisors (154839614).

166651330 is a wasteful number, since it uses less digits than its factorization.

166651330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19650.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 166651330 is about 12909.3504871469. The cubic root of 166651330 is about 550.3043274454.

The spelling of 166651330 in words is "one hundred sixty-six million, six hundred fifty-one thousand, three hundred thirty".