166447706745 has 16 divisors (see below), whose sum is σ = 277895302272. Its totient is φ = 84912453120.

The previous prime is 166447706717. The next prime is 166447706767. The reversal of 166447706745 is 547607744661.

It is a happy number.

It is not a de Polignac number, because 166447706745 - 2¹² = 166447702649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241228216 + ... + 241228905.

It is an arithmetic number, because the mean of its divisors is an integer number (17368456392).

Almost surely, 2^166447706745 is an apocalyptic number.

166447706745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166447706745 is a deficient number, since it is larger than the sum of its proper divisors (111447595527).

166447706745 is a wasteful number, since it uses less digits than its factorization.

166447706745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482457152.

The product of its (nonzero) digits is 23708160, while the sum is 57.

The spelling of 166447706745 in words is "one hundred sixty-six billion, four hundred forty-seven million, seven hundred six thousand, seven hundred forty-five".