166025476417 has 2 divisors, whose sum is σ = 166025476418. Its totient is φ = 166025476416.

The previous prime is 166025476391. The next prime is 166025476433. The reversal of 166025476417 is 714674520661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143522776336 + 22502700081 = 378844^2 + 150009^2 .

It is a cyclic number.

It is not a de Polignac number, because 166025476417 - 2¹⁹ = 166024952129 is a prime.

It is not a weakly prime, because it can be changed into another prime (166025476447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83012738208 + 83012738209.

It is an arithmetic number, because the mean of its divisors is an integer number (83012738209).

Almost surely, 2^166025476417 is an apocalyptic number.

It is an amenable number.

166025476417 is a deficient number, since it is larger than the sum of its proper divisors (1).

166025476417 is an equidigital number, since it uses as much as digits as its factorization.

166025476417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 166025476417 in words is "one hundred sixty-six billion, twenty-five million, four hundred seventy-six thousand, four hundred seventeen".