166890186724 has 12 divisors (see below), whose sum is σ = 292093838064. Its totient is φ = 83434804424.

The previous prime is 166890186689. The next prime is 166890186737. The reversal of 166890186724 is 427681098661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535682 + ... + 2600665.

It is an arithmetic number, because the mean of its divisors is an integer number (24341153172).

Almost surely, 2^166890186724 is an apocalyptic number.

It is an amenable number.

166890186724 is a deficient number, since it is larger than the sum of its proper divisors (125203651340).

166890186724 is a wasteful number, since it uses less digits than its factorization.

166890186724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144474 (or 5144472 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 58.

It can be divided in two parts, 1668901 and 86724, that added together give a square (1755625 = 1325²).

The spelling of 166890186724 in words is "one hundred sixty-six billion, eight hundred ninety million, one hundred eighty-six thousand, seven hundred twenty-four".