166900464391 has 8 divisors (see below), whose sum is σ = 167853939120. Its totient is φ = 165947224128.

The previous prime is 166900464361. The next prime is 166900464553. The reversal of 166900464391 is 193464009661.

It is a happy number.

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 166900464391 - 2⁵ = 166900464359 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 (166900464331) 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, 1484635 + ... + 1593091.

It is an arithmetic number, because the mean of its divisors is an integer number (20981742390).

Almost surely, 2^166900464391 is an apocalyptic number.

166900464391 is a deficient number, since it is larger than the sum of its proper divisors (953474729).

166900464391 is a wasteful number, since it uses less digits than its factorization.

166900464391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117233.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 166900464391 in words is "one hundred sixty-six billion, nine hundred million, four hundred sixty-four thousand, three hundred ninety-one".