166322507 has 4 divisors (see below), whose sum is σ = 179116560. Its totient is φ = 153528456.

The previous prime is 166322501. The next prime is 166322537. The reversal of 166322507 is 705223661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705223661 = 443 ⋅1591927.

It is a cyclic number.

It is not a de Polignac number, because 166322507 - 2⁴ = 166322491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166322501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6397007 + ... + 6397032.

It is an arithmetic number, because the mean of its divisors is an integer number (44779140).

Almost surely, 2^166322507 is an apocalyptic number.

166322507 is a deficient number, since it is larger than the sum of its proper divisors (12794053).

166322507 is a wasteful number, since it uses less digits than its factorization.

166322507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12794052.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 166322507 is about 12896.6083525863. The cubic root of 166322507 is about 549.9421503894.

The spelling of 166322507 in words is "one hundred sixty-six million, three hundred twenty-two thousand, five hundred seven".