166660181033473 has 4 divisors (see below), whose sum is σ = 166769038109488. Its totient is φ = 166551323957460.

The previous prime is 166660181033461. The next prime is 166660181033491. The reversal of 166660181033473 is 374330181066661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166660181033473 - 2²⁵ = 166660147479041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166660181033573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54428535711 + ... + 54428538772.

It is an arithmetic number, because the mean of its divisors is an integer number (41692259527372).

Almost surely, 2^{166660181033473} is an apocalyptic number.

It is an amenable number.

166660181033473 is a deficient number, since it is larger than the sum of its proper divisors (108857076015).

166660181033473 is a wasteful number, since it uses less digits than its factorization.

166660181033473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108857076014.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 166660181033473 in words is "one hundred sixty-six trillion, six hundred sixty billion, one hundred eighty-one million, thirty-three thousand, four hundred seventy-three".