166772516 has 12 divisors (see below), whose sum is σ = 309019788. Its totient is φ = 78481152.

The previous prime is 166772509. The next prime is 166772611. The reversal of 166772516 is 615277661.

It can be written as a sum of positive squares in 2 ways, for example, as 56942116 + 109830400 = 7546^2 + 10480^2 .

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, 1226201 + ... + 1226336.

It is an arithmetic number, because the mean of its divisors is an integer number (25751649).

Almost surely, 2^166772516 is an apocalyptic number.

It is an amenable number.

166772516 is a deficient number, since it is larger than the sum of its proper divisors (142247272).

166772516 is a wasteful number, since it uses less digits than its factorization.

166772516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452558 (or 2452556 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 166772516 is about 12914.0433637184. The cubic root of 166772516 is about 550.4376857604.

The spelling of 166772516 in words is "one hundred sixty-six million, seven hundred seventy-two thousand, five hundred sixteen".