166668516837 has 16 divisors (see below), whose sum is σ = 246934080000. Its totient is φ = 111104353152.

The previous prime is 166668516823. The next prime is 166668516863. The reversal of 166668516837 is 738615866661.

It is not a de Polignac number, because 166668516837 - 2⁴ = 166668516821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166668516877) 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, 173164 + ... + 602762.

It is an arithmetic number, because the mean of its divisors is an integer number (15433380000).

Almost surely, 2^166668516837 is an apocalyptic number.

It is an amenable number.

166668516837 is a deficient number, since it is larger than the sum of its proper divisors (80265563163).

166668516837 is a wasteful number, since it uses less digits than its factorization.

166668516837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443977 (or 443971 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 166668516837 in words is "one hundred sixty-six billion, six hundred sixty-eight million, five hundred sixteen thousand, eight hundred thirty-seven".