166730313261 has 8 divisors (see below), whose sum is σ = 222462876384. Its totient is φ = 111075646160.

The previous prime is 166730313257. The next prime is 166730313283. The reversal of 166730313261 is 162313037661.

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 166730313261 - 2² = 166730313257 is a prime.

It is a super-2 number, since 2×166730313261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166730313221) 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, 19469010 + ... + 19477571.

It is an arithmetic number, because the mean of its divisors is an integer number (27807859548).

Almost surely, 2^166730313261 is an apocalyptic number.

It is an amenable number.

166730313261 is a deficient number, since it is larger than the sum of its proper divisors (55732563123).

166730313261 is a wasteful number, since it uses less digits than its factorization.

166730313261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38948011.

The product of its (nonzero) digits is 81648, while the sum is 39.

The spelling of 166730313261 in words is "one hundred sixty-six billion, seven hundred thirty million, three hundred thirteen thousand, two hundred sixty-one".