166161588477 has 8 divisors (see below), whose sum is σ = 221559260064. Its totient is φ = 110769154608.

The previous prime is 166161588469. The next prime is 166161588557. The reversal of 166161588477 is 774885161661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166161588477 - 2³ = 166161588469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166161588477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166161580477) 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, 1234798 + ... + 1362735.

It is an arithmetic number, because the mean of its divisors is an integer number (27694907508).

Almost surely, 2^166161588477 is an apocalyptic number.

It is an amenable number.

166161588477 is a deficient number, since it is larger than the sum of its proper divisors (55397671587).

166161588477 is a wasteful number, since it uses less digits than its factorization.

166161588477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618859.

The product of its digits is 13547520, while the sum is 60.

The spelling of 166161588477 in words is "one hundred sixty-six billion, one hundred sixty-one million, five hundred eighty-eight thousand, four hundred seventy-seven".