166521060642 has 8 divisors (see below), whose sum is σ = 333042121296. Its totient is φ = 55507020212.

The previous prime is 166521060623. The next prime is 166521060683. The reversal of 166521060642 is 246060125661.

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

166521060642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 166521060642.

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, 13876755048 + ... + 13876755059.

It is an arithmetic number, because the mean of its divisors is an integer number (41630265162).

Almost surely, 2^166521060642 is an apocalyptic number.

166521060642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166521060642 is a wasteful number, since it uses less digits than its factorization.

166521060642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27753510112.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 166521060642 in words is "one hundred sixty-six billion, five hundred twenty-one million, sixty thousand, six hundred forty-two".