166944369387 has 8 divisors (see below), whose sum is σ = 222596098704. Its totient is φ = 111294443168.

The previous prime is 166944369349. The next prime is 166944369433. The reversal of 166944369387 is 783963449661.

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

It is a cyclic number.

It is not a de Polignac number, because 166944369387 - 2⁸ = 166944369131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166944389387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217488 + ... + 617405.

It is an arithmetic number, because the mean of its divisors is an integer number (27824512338).

Almost surely, 2^166944369387 is an apocalyptic number.

166944369387 is a deficient number, since it is larger than the sum of its proper divisors (55651729317).

166944369387 is an equidigital number, since it uses as much as digits as its factorization.

166944369387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901549.

The product of its digits is 141087744, while the sum is 66.

The spelling of 166944369387 in words is "one hundred sixty-six billion, nine hundred forty-four million, three hundred sixty-nine thousand, three hundred eighty-seven".