166889994782 has 8 divisors (see below), whose sum is σ = 286097133936. Its totient is φ = 71524283472.

The previous prime is 166889994779. The next prime is 166889994787. The reversal of 166889994782 is 287499988661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166889994787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5960356943 + ... + 5960356970.

It is an arithmetic number, because the mean of its divisors is an integer number (35762141742).

Almost surely, 2^166889994782 is an apocalyptic number.

166889994782 is a deficient number, since it is larger than the sum of its proper divisors (119207139154).

166889994782 is a wasteful number, since it uses less digits than its factorization.

166889994782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11920713922.

The product of its digits is 752467968, while the sum is 77.

The spelling of 166889994782 in words is "one hundred sixty-six billion, eight hundred eighty-nine million, nine hundred ninety-four thousand, seven hundred eighty-two".