1665120712 has 16 divisors (see below), whose sum is σ = 3126337200. Its totient is φ = 831430800.

The previous prime is 1665120661. The next prime is 1665120757. The reversal of 1665120712 is 2170215661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134914 + ... + 146737.

It is an arithmetic number, because the mean of its divisors is an integer number (195396075).

Almost surely, 2^1665120712 is an apocalyptic number.

It is an amenable number.

1665120712 is a deficient number, since it is larger than the sum of its proper divisors (1461216488).

1665120712 is a wasteful number, since it uses less digits than its factorization.

1665120712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282396 (or 282392 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1665120712 is about 40805.8906531888. The cubic root of 1665120712 is about 1185.2644017062.

The spelling of 1665120712 in words is "one billion, six hundred sixty-five million, one hundred twenty thousand, seven hundred twelve".