166134977 has 2 divisors, whose sum is σ = 166134978. Its totient is φ = 166134976.

The previous prime is 166134961. The next prime is 166135027. The reversal of 166134977 is 779431661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137147521 + 28987456 = 11711^2 + 5384^2 .

It is a cyclic number.

It is not a de Polignac number, because 166134977 - 2⁴ = 166134961 is a prime.

It is equal to p_9298736 and since 166134977 and 9298736 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166134937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83067488 + 83067489.

It is an arithmetic number, because the mean of its divisors is an integer number (83067489).

Almost surely, 2^166134977 is an apocalyptic number.

It is an amenable number.

166134977 is a deficient number, since it is larger than the sum of its proper divisors (1).

166134977 is an equidigital number, since it uses as much as digits as its factorization.

166134977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 166134977 is about 12889.3357858347. The cubic root of 166134977 is about 549.7353845546.

The spelling of 166134977 in words is "one hundred sixty-six million, one hundred thirty-four thousand, nine hundred seventy-seven".