666010009997 has 2 divisors, whose sum is σ = 666010009998. Its totient is φ = 666010009996.

The previous prime is 666010009993. The next prime is 666010010033. The reversal of 666010009997 is 799900010666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660986886121 + 5023123876 = 813011^2 + 70874^2 .

It is a cyclic number.

It is not a de Polignac number, because 666010009997 - 2² = 666010009993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666010009991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333005004998 + 333005004999.

It is an arithmetic number, because the mean of its divisors is an integer number (333005004999).

Almost surely, 2^666010009997 is an apocalyptic number.

It is an amenable number.

666010009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

666010009997 is an equidigital number, since it uses as much as digits as its factorization.

666010009997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The spelling of 666010009997 in words is "six hundred sixty-six billion, ten million, nine thousand, nine hundred ninety-seven".