166646630 has 8 divisors (see below), whose sum is σ = 299963952. Its totient is φ = 66658648.

The previous prime is 166646617. The next prime is 166646633. The reversal of 166646630 is 36646661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166646633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8332322 + ... + 8332341.

It is an arithmetic number, because the mean of its divisors is an integer number (37495494).

Almost surely, 2^166646630 is an apocalyptic number.

166646630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166646630 is a deficient number, since it is larger than the sum of its proper divisors (133317322).

166646630 is a wasteful number, since it uses less digits than its factorization.

166646630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16664670.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 166646630 is about 12909.1684472703. The cubic root of 166646630 is about 550.2991540601.

The spelling of 166646630 in words is "one hundred sixty-six million, six hundred forty-six thousand, six hundred thirty".