1666317120 has 112 divisors (see below), whose sum is σ = 5697565440. Its totient is φ = 410167296.

The previous prime is 1666317113. The next prime is 1666317131. The reversal of 1666317120 is 217136661.

It is a super-2 number, since 2×1666317120² = 5553225488810188800, which contains 22 as substring.

It is a congruent number.

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, 54280 + ... + 79239.

It is an arithmetic number, because the mean of its divisors is an integer number (50871120).

Almost surely, 2^1666317120 is an apocalyptic number.

1666317120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666317120 is an abundant number, since it is smaller than the sum of its proper divisors (4031248320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666317120 is a wasteful number, since it uses less digits than its factorization.

1666317120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133552 (or 133542 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 1666317120 is about 40820.5477670254. The cubic root of 1666317120 is about 1185.5482090216.

The spelling of 1666317120 in words is "one billion, six hundred sixty-six million, three hundred seventeen thousand, one hundred twenty".