166649930 has 16 divisors (see below), whose sum is σ = 300119904. Its totient is φ = 66626640.

The previous prime is 166649909. The next prime is 166649933. The reversal of 166649930 is 39946661.

166649930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166649933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30809 + ... + 35811.

It is an arithmetic number, because the mean of its divisors is an integer number (18757494).

Almost surely, 2^166649930 is an apocalyptic number.

166649930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166649930 is a deficient number, since it is larger than the sum of its proper divisors (133469974).

166649930 is a wasteful number, since it uses less digits than its factorization.

166649930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 166649930 is about 12909.2962627713. The cubic root of 166649930 is about 550.3027864472.

The spelling of 166649930 in words is "one hundred sixty-six million, six hundred forty-nine thousand, nine hundred thirty".