166326151 has 4 divisors (see below), whose sum is σ = 167941072. Its totient is φ = 164711232.

The previous prime is 166326143. The next prime is 166326157. The reversal of 166326151 is 151623661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151623661 = 7 ⋅21660523.

It is a cyclic number.

It is not a de Polignac number, because 166326151 - 2³ = 166326143 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 (166326157) 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, 807306 + ... + 807511.

It is an arithmetic number, because the mean of its divisors is an integer number (41985268).

Almost surely, 2^166326151 is an apocalyptic number.

166326151 is a deficient number, since it is larger than the sum of its proper divisors (1614921).

166326151 is a wasteful number, since it uses less digits than its factorization.

166326151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614920.

The product of its digits is 6480, while the sum is 31.

The square root of 166326151 is about 12896.7496292671. The cubic root of 166326151 is about 549.9461666319.

The spelling of 166326151 in words is "one hundred sixty-six million, three hundred twenty-six thousand, one hundred fifty-one".