1666951172 has 12 divisors (see below), whose sum is σ = 2917603920. Its totient is φ = 833350056.

The previous prime is 1666951159. The next prime is 1666951183. The reversal of 1666951172 is 2711596661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579 + ... + 57797.

It is an arithmetic number, because the mean of its divisors is an integer number (243133660).

Almost surely, 2^1666951172 is an apocalyptic number.

It is an amenable number.

1666951172 is a deficient number, since it is larger than the sum of its proper divisors (1250652748).

1666951172 is a wasteful number, since it uses less digits than its factorization.

1666951172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62770 (or 62768 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 1666951172 is about 40828.3133621755. The cubic root of 1666951172 is about 1185.6985613326.

The spelling of 1666951172 in words is "one billion, six hundred sixty-six million, nine hundred fifty-one thousand, one hundred seventy-two".