166372407 has 8 divisors (see below), whose sum is σ = 246477680. Its totient is φ = 110914920.

The previous prime is 166372403. The next prime is 166372463. The reversal of 166372407 is 704273661.

166372407 is a `hidden beast` number, since 16 + 637 + 2 + 4 + 0 + 7 = 666.

It is not a de Polignac number, because 166372407 - 2² = 166372403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166372403) 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, 3080944 + ... + 3080997.

It is an arithmetic number, because the mean of its divisors is an integer number (30809710).

Almost surely, 2^166372407 is an apocalyptic number.

166372407 is a deficient number, since it is larger than the sum of its proper divisors (80105273).

166372407 is an equidigital number, since it uses as much as digits as its factorization.

166372407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6161950 (or 6161944 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 166372407 is about 12898.5428246760. The cubic root of 166372407 is about 549.9971426849.

It can be divided in two parts, 16637 and 2407, that added together give a square (19044 = 138²).

The spelling of 166372407 in words is "one hundred sixty-six million, three hundred seventy-two thousand, four hundred seven".