166613801 has 2 divisors, whose sum is σ = 166613802. Its totient is φ = 166613800.

The previous prime is 166613773. The next prime is 166613807. The reversal of 166613801 is 108316661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87403801 + 79210000 = 9349^2 + 8900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166613801 is a prime.

It is not a weakly prime, because it can be changed into another prime (166613807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83306900 + 83306901.

It is an arithmetic number, because the mean of its divisors is an integer number (83306901).

Almost surely, 2^166613801 is an apocalyptic number.

It is an amenable number.

166613801 is a deficient number, since it is larger than the sum of its proper divisors (1).

166613801 is an equidigital number, since it uses as much as digits as its factorization.

166613801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 166613801 is about 12907.8968465045. The cubic root of 166613801 is about 550.2630158008.

The spelling of 166613801 in words is "one hundred sixty-six million, six hundred thirteen thousand, eight hundred one".