166157311 has 4 divisors (see below), whose sum is σ = 167681800. Its totient is φ = 164632824.

The previous prime is 166157293. The next prime is 166157317. The reversal of 166157311 is 113751661.

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

It is a cyclic number.

It is not a de Polignac number, because 166157311 - 2⁷ = 166157183 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 (166157317) 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, 762081 + ... + 762298.

It is an arithmetic number, because the mean of its divisors is an integer number (41920450).

Almost surely, 2^166157311 is an apocalyptic number.

166157311 is a deficient number, since it is larger than the sum of its proper divisors (1524489).

166157311 is a wasteful number, since it uses less digits than its factorization.

166157311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524488.

The product of its digits is 3780, while the sum is 31.

The square root of 166157311 is about 12890.2021318519. The cubic root of 166157311 is about 549.7600176174.

The spelling of 166157311 in words is "one hundred sixty-six million, one hundred fifty-seven thousand, three hundred eleven".