166414009 has 2 divisors, whose sum is σ = 166414010. Its totient is φ = 166414008.

The previous prime is 166413943. The next prime is 166414013. The reversal of 166414009 is 900414661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100560784 + 65853225 = 10028^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 166414009 - 2⁷ = 166413881 is a prime.

It is not a weakly prime, because it can be changed into another prime (166414099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83207004 + 83207005.

It is an arithmetic number, because the mean of its divisors is an integer number (83207005).

Almost surely, 2^166414009 is an apocalyptic number.

It is an amenable number.

166414009 is a deficient number, since it is larger than the sum of its proper divisors (1).

166414009 is an equidigital number, since it uses as much as digits as its factorization.

166414009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 166414009 is about 12900.1553866610. The cubic root of 166414009 is about 550.0429817649.

The spelling of 166414009 in words is "one hundred sixty-six million, four hundred fourteen thousand, nine".