166220372 has 12 divisors (see below), whose sum is σ = 294983136. Its totient is φ = 81939480.

The previous prime is 166220359. The next prime is 166220381. The reversal of 166220372 is 273022661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292358 + ... + 292925.

It is an arithmetic number, because the mean of its divisors is an integer number (24581928).

Almost surely, 2^166220372 is an apocalyptic number.

It is an amenable number.

166220372 is a deficient number, since it is larger than the sum of its proper divisors (128762764).

166220372 is a wasteful number, since it uses less digits than its factorization.

166220372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585358 (or 585356 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 166220372 is about 12892.6479824744. The cubic root of 166220372 is about 549.8295582058.

The spelling of 166220372 in words is "one hundred sixty-six million, two hundred twenty thousand, three hundred seventy-two".