166308390 has 40 divisors (see below), whose sum is σ = 447186960. Its totient is φ = 44348688.

The previous prime is 166308383. The next prime is 166308403. The reversal of 166308390 is 93803661.

It is a happy number.

166308390 is a `hidden beast` number, since 16 + 630 + 8 + 3 + 9 + 0 = 666.

166308390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101850 + ... + 103469.

It is an arithmetic number, because the mean of its divisors is an integer number (11179674).

Almost surely, 2^166308390 is an apocalyptic number.

166308390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166308390 is an abundant number, since it is smaller than the sum of its proper divisors (280878570).

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

166308390 is a wasteful number, since it uses less digits than its factorization.

166308390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205338 (or 205329 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 166308390 is about 12896.0610265305. The cubic root of 166308390 is about 549.9265907534.

The spelling of 166308390 in words is "one hundred sixty-six million, three hundred eight thousand, three hundred ninety".