366669986989 has 2 divisors, whose sum is σ = 366669986990. Its totient is φ = 366669986988.

The previous prime is 366669986953. The next prime is 366669986993. The reversal of 366669986989 is 989689966663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259633049764 + 107036937225 = 509542^2 + 327165^2 .

It is a cyclic number.

It is not a de Polignac number, because 366669986989 - 2²⁷ = 366535769261 is a prime.

It is a super-2 number, since 2×366669986989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366669986789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183334993494 + 183334993495.

It is an arithmetic number, because the mean of its divisors is an integer number (183334993495).

Almost surely, 2^366669986989 is an apocalyptic number.

It is an amenable number.

366669986989 is a deficient number, since it is larger than the sum of its proper divisors (1).

366669986989 is an equidigital number, since it uses as much as digits as its factorization.

366669986989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9795520512, while the sum is 85.

The spelling of 366669986989 in words is "three hundred sixty-six billion, six hundred sixty-nine million, nine hundred eighty-six thousand, nine hundred eighty-nine".