166540032325351 has 16 divisors (see below), whose sum is σ = 175605811200000. Its totient is φ = 157504328426016.

The previous prime is 166540032325321. The next prime is 166540032325379. The reversal of 166540032325351 is 153523230045661.

It is a cyclic number.

It is not a de Polignac number, because 166540032325351 - 2³³ = 166531442390759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166540032325321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263598490 + ... + 264229528.

It is an arithmetic number, because the mean of its divisors is an integer number (10975363200000).

Almost surely, 2^{166540032325351} is an apocalyptic number.

166540032325351 is a deficient number, since it is larger than the sum of its proper divisors (9065778874649).

166540032325351 is a wasteful number, since it uses less digits than its factorization.

166540032325351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654846.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 166540032325351 in words is "one hundred sixty-six trillion, five hundred forty billion, thirty-two million, three hundred twenty-five thousand, three hundred fifty-one".