5660927981 has 2 divisors, whose sum is σ = 5660927982. Its totient is φ = 5660927980.

The previous prime is 5660927947. The next prime is 5660928023. The reversal of 5660927981 is 1897290665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4514496100 + 1146431881 = 67190^2 + 33859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5660927981 is a prime.

It is a super-2 number, since 2×5660927981² = 64092211212137472722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5660927911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830463990 + 2830463991.

It is an arithmetic number, because the mean of its divisors is an integer number (2830463991).

Almost surely, 2^5660927981 is an apocalyptic number.

It is an amenable number.

5660927981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5660927981 is an equidigital number, since it uses as much as digits as its factorization.

5660927981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The square root of 5660927981 is about 75239.1386247876. The cubic root of 5660927981 is about 1782.2250486566.

The spelling of 5660927981 in words is "five billion, six hundred sixty million, nine hundred twenty-seven thousand, nine hundred eighty-one".