166259277393 has 32 divisors (see below), whose sum is σ = 244456192512. Its totient is φ = 99670771200.

The previous prime is 166259277329. The next prime is 166259277397. The reversal of 166259277393 is 393772952661.

It is not a de Polignac number, because 166259277393 - 2⁶ = 166259277329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166259277397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6398638 + ... + 6424568.

It is an arithmetic number, because the mean of its divisors is an integer number (7639256016).

Almost surely, 2^166259277393 is an apocalyptic number.

It is an amenable number.

166259277393 is a deficient number, since it is larger than the sum of its proper divisors (78196915119).

166259277393 is a wasteful number, since it uses less digits than its factorization.

166259277393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28045.

The product of its digits is 25719120, while the sum is 60.

The spelling of 166259277393 in words is "one hundred sixty-six billion, two hundred fifty-nine million, two hundred seventy-seven thousand, three hundred ninety-three".