166464131 has 2 divisors, whose sum is σ = 166464132. Its totient is φ = 166464130.

The previous prime is 166464127. The next prime is 166464143. The reversal of 166464131 is 131464661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166464131 - 2² = 166464127 is a prime.

It is a super-4 number, since 4×166464131⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (166464631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83232065 + 83232066.

It is an arithmetic number, because the mean of its divisors is an integer number (83232066).

Almost surely, 2^166464131 is an apocalyptic number.

166464131 is a deficient number, since it is larger than the sum of its proper divisors (1).

166464131 is an equidigital number, since it uses as much as digits as its factorization.

166464131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 166464131 is about 12902.0979301817. The cubic root of 166464131 is about 550.0981984443.

The spelling of 166464131 in words is "one hundred sixty-six million, four hundred sixty-four thousand, one hundred thirty-one".