166564064003644 has 24 divisors (see below), whose sum is σ = 298318648602240. Its totient is φ = 81344257310784.

The previous prime is 166564064003611. The next prime is 166564064003663. The reversal of 166564064003644 is 446300460465661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1761566059 + ... + 1761660610.

It is an arithmetic number, because the mean of its divisors is an integer number (12429943691760).

Almost surely, 2^{166564064003644} is an apocalyptic number.

It is an amenable number.

166564064003644 is a deficient number, since it is larger than the sum of its proper divisors (131754584598596).

166564064003644 is a wasteful number, since it uses less digits than its factorization.

166564064003644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523226949 (or 3523226947 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 55.

The spelling of 166564064003644 in words is "one hundred sixty-six trillion, five hundred sixty-four billion, sixty-four million, three thousand, six hundred forty-four".