1660374720 has 112 divisors (see below), whose sum is σ = 5857463520. Its totient is φ = 442764288.

The previous prime is 1660374701. The next prime is 1660374731. The reversal of 1660374720 is 274730661.

1660374720 is a `hidden beast` number, since 1 + 6 + 603 + 7 + 47 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 87447 + ... + 104726.

Almost surely, 2^1660374720 is an apocalyptic number.

1660374720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660374720 is an abundant number, since it is smaller than the sum of its proper divisors (4197088800).

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

1660374720 is a wasteful number, since it uses less digits than its factorization.

1660374720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192199 (or 192183 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 1660374720 is about 40747.6958857798. The cubic root of 1660374720 is about 1184.1372345190.

The spelling of 1660374720 in words is "one billion, six hundred sixty million, three hundred seventy-four thousand, seven hundred twenty".