6610492981 has 2 divisors, whose sum is σ = 6610492982. Its totient is φ = 6610492980.

The previous prime is 6610492969. The next prime is 6610492991. The reversal of 6610492981 is 1892940166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6378418225 + 232074756 = 79865^2 + 15234^2 .

It is a cyclic number.

It is not a de Polignac number, because 6610492981 - 2¹³ = 6610484789 is a prime.

It is a super-2 number, since 2×6610492981² = 87397234903700532722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6610492991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305246490 + 3305246491.

It is an arithmetic number, because the mean of its divisors is an integer number (3305246491).

Almost surely, 2^6610492981 is an apocalyptic number.

It is an amenable number.

6610492981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6610492981 is an equidigital number, since it uses as much as digits as its factorization.

6610492981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 6610492981 is about 81304.9382325576. The cubic root of 6610492981 is about 1876.7709945433.

The spelling of 6610492981 in words is "six billion, six hundred ten million, four hundred ninety-two thousand, nine hundred eighty-one".