6660983493 has 6 divisors (see below), whose sum is σ = 9621420614. Its totient is φ = 4440655656.

The previous prime is 6660983489. The next prime is 6660983509. The reversal of 6660983493 is 3943890666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5318347329 + 1342636164 = 72927^2 + 36642^2 .

It is not a de Polignac number, because 6660983493 - 2² = 6660983489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660983453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 370054630 + ... + 370054647.

Almost surely, 2^6660983493 is an apocalyptic number.

It is an amenable number.

6660983493 is a deficient number, since it is larger than the sum of its proper divisors (2960437121).

6660983493 is a wasteful number, since it uses less digits than its factorization.

6660983493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740109283 (or 740109280 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The square root of 6660983493 is about 81614.8484835940. The cubic root of 6660983493 is about 1881.5370986021.

The spelling of 6660983493 in words is "six billion, six hundred sixty million, nine hundred eighty-three thousand, four hundred ninety-three".