166677295491939 has 4 divisors (see below), whose sum is σ = 222236393989256. Its totient is φ = 111118196994624.

The previous prime is 166677295491907. The next prime is 166677295491983. The reversal of 166677295491939 is 939194592776661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166677295491939 - 2⁵ = 166677295491907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166677295490939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27779549248654 + ... + 27779549248659.

It is an arithmetic number, because the mean of its divisors is an integer number (55559098497314).

Almost surely, 2^{166677295491939} is an apocalyptic number.

166677295491939 is a deficient number, since it is larger than the sum of its proper divisors (55559098497317).

166677295491939 is an equidigital number, since it uses as much as digits as its factorization.

166677295491939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55559098497316.

The product of its digits is 8332994880, while the sum is 84.

The spelling of 166677295491939 in words is "one hundred sixty-six trillion, six hundred seventy-seven billion, two hundred ninety-five million, four hundred ninety-one thousand, nine hundred thirty-nine".