166958659789 has 8 divisors (see below), whose sum is σ = 172430788608. Its totient is φ = 161491928880.

The previous prime is 166958659771. The next prime is 166958659799. The reversal of 166958659789 is 987956859661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166958659789 - 2¹³ = 166958651597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166958659709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286557 + ... + 1410370.

It is an arithmetic number, because the mean of its divisors is an integer number (21553848576).

Almost surely, 2^166958659789 is an apocalyptic number.

It is an amenable number.

166958659789 is a deficient number, since it is larger than the sum of its proper divisors (5472128819).

166958659789 is a wasteful number, since it uses less digits than its factorization.

166958659789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698955.

The product of its digits is 1763596800, while the sum is 79.

The spelling of 166958659789 in words is "one hundred sixty-six billion, nine hundred fifty-eight million, six hundred fifty-nine thousand, seven hundred eighty-nine".