166051133 has 4 divisors (see below), whose sum is σ = 166150908. Its totient is φ = 165951360.

The previous prime is 166051111. The next prime is 166051139. The reversal of 166051133 is 331150661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28270489 + 137780644 = 5317^2 + 11738^2 .

It is a cyclic number.

It is not a de Polignac number, because 166051133 - 2⁶ = 166051069 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 (166051139) 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, 47348 + ... + 50733.

It is an arithmetic number, because the mean of its divisors is an integer number (41537727).

Almost surely, 2^166051133 is an apocalyptic number.

It is an amenable number.

166051133 is a deficient number, since it is larger than the sum of its proper divisors (99775).

166051133 is an equidigital number, since it uses as much as digits as its factorization.

166051133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99774.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 166051133 is about 12886.0829191807. The cubic root of 166051133 is about 549.6428899449.

The spelling of 166051133 in words is "one hundred sixty-six million, fifty-one thousand, one hundred thirty-three".