6657499061 has 2 divisors, whose sum is σ = 6657499062. Its totient is φ = 6657499060.

The previous prime is 6657498959. The next prime is 6657499087. The reversal of 6657499061 is 1609947566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6608064100 + 49434961 = 81290^2 + 7031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6657499061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6657498994 and 6657499012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657496061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328749530 + 3328749531.

It is an arithmetic number, because the mean of its divisors is an integer number (3328749531).

Almost surely, 2^6657499061 is an apocalyptic number.

It is an amenable number.

6657499061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657499061 is an equidigital number, since it uses as much as digits as its factorization.

6657499061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 6657499061 is about 81593.4988893110. The cubic root of 6657499061 is about 1881.2089572897.

The spelling of 6657499061 in words is "six billion, six hundred fifty-seven million, four hundred ninety-nine thousand, sixty-one".