166372445 has 16 divisors (see below), whose sum is σ = 201942720. Its totient is φ = 131577600.

The previous prime is 166372403. The next prime is 166372463. The reversal of 166372445 is 544273661.

166372445 = 163² + 164² + ... + 795².

It is a happy number.

It is not a de Polignac number, because 166372445 - 2¹⁰ = 166371421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166372399 and 166372408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188405 + ... + 189285.

It is an arithmetic number, because the mean of its divisors is an integer number (12621420).

Almost surely, 2^166372445 is an apocalyptic number.

It is an amenable number.

166372445 is a deficient number, since it is larger than the sum of its proper divisors (35570275).

166372445 is a wasteful number, since it uses less digits than its factorization.

166372445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its digits is 120960, while the sum is 38.

The square root of 166372445 is about 12898.5442977105. The cubic root of 166372445 is about 549.9971845586.

The spelling of 166372445 in words is "one hundred sixty-six million, three hundred seventy-two thousand, four hundred forty-five".