166566017676622 has 4 divisors (see below), whose sum is σ = 249849026514936. Its totient is φ = 83283008838310.

The previous prime is 166566017676599. The next prime is 166566017676689. The reversal of 166566017676622 is 226676710665661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41641504419154 + ... + 41641504419157.

It is an arithmetic number, because the mean of its divisors is an integer number (62462256628734).

Almost surely, 2^{166566017676622} is an apocalyptic number.

166566017676622 is a deficient number, since it is larger than the sum of its proper divisors (83283008838314).

166566017676622 is an equidigital number, since it uses as much as digits as its factorization.

166566017676622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83283008838313.

The product of its (nonzero) digits is 274337280, while the sum is 67.

The spelling of 166566017676622 in words is "one hundred sixty-six trillion, five hundred sixty-six billion, seventeen million, six hundred seventy-six thousand, six hundred twenty-two".