166670591451 has 32 divisors (see below), whose sum is σ = 277257469440. Its totient is φ = 86709844224.

The previous prime is 166670591443. The next prime is 166670591471. The reversal of 166670591451 is 154195076661.

It is not a de Polignac number, because 166670591451 - 2³ = 166670591443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166670591394 and 166670591403.

It is not an unprimeable number, because it can be changed into a prime (166670591441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4161681 + ... + 4201538.

It is an arithmetic number, because the mean of its divisors is an integer number (8664295920).

Almost surely, 2^166670591451 is an apocalyptic number.

166670591451 is a deficient number, since it is larger than the sum of its proper divisors (110586877989).

166670591451 is a wasteful number, since it uses less digits than its factorization.

166670591451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8363315.

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 166670591451 in words is "one hundred sixty-six billion, six hundred seventy million, five hundred ninety-one thousand, four hundred fifty-one".