1660565996 has 6 divisors (see below), whose sum is σ = 2905990500. Its totient is φ = 830282996.

The previous prime is 1660565987. The next prime is 1660565999. The reversal of 1660565996 is 6995650661.

It is not an unprimeable number, because it can be changed into a prime (1660565999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207570746 + ... + 207570753.

It is an arithmetic number, because the mean of its divisors is an integer number (484331750).

Almost surely, 2^1660565996 is an apocalyptic number.

It is an amenable number.

1660565996 is a deficient number, since it is larger than the sum of its proper divisors (1245424504).

1660565996 is a wasteful number, since it uses less digits than its factorization.

1660565996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415141503 (or 415141501 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 53.

The square root of 1660565996 is about 40750.0428956829. The cubic root of 1660565996 is about 1184.1827038406.

The spelling of 1660565996 in words is "one billion, six hundred sixty million, five hundred sixty-five thousand, nine hundred ninety-six".