166657781324 has 48 divisors (see below), whose sum is σ = 298632956160. Its totient is φ = 81357756480.

The previous prime is 166657781309. The next prime is 166657781347. The reversal of 166657781324 is 423187756661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166657781324.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33946982 + ... + 33951890.

It is an arithmetic number, because the mean of its divisors is an integer number (6221519920).

Almost surely, 2^166657781324 is an apocalyptic number.

It is an amenable number.

166657781324 is a deficient number, since it is larger than the sum of its proper divisors (131975174836).

166657781324 is a wasteful number, since it uses less digits than its factorization.

166657781324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6078 (or 6076 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 56.

The spelling of 166657781324 in words is "one hundred sixty-six billion, six hundred fifty-seven million, seven hundred eighty-one thousand, three hundred twenty-four".