666702407369 has 2 divisors, whose sum is σ = 666702407370. Its totient is φ = 666702407368.

The previous prime is 666702407351. The next prime is 666702407387. The reversal of 666702407369 is 963704207666.

It is a balanced prime because it is at equal distance from previous prime (666702407351) and next prime (666702407387).

It can be written as a sum of positive squares in only one way, i.e., 580357523344 + 86344884025 = 761812^2 + 293845^2 .

It is a cyclic number.

It is not a de Polignac number, because 666702407369 - 2²⁸ = 666433971913 is a prime.

It is a super-2 number, since 2×666702407369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666702407069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333351203684 + 333351203685.

It is an arithmetic number, because the mean of its divisors is an integer number (333351203685).

Almost surely, 2^666702407369 is an apocalyptic number.

It is an amenable number.

666702407369 is a deficient number, since it is larger than the sum of its proper divisors (1).

666702407369 is an equidigital number, since it uses as much as digits as its factorization.

666702407369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 666702407369 in words is "six hundred sixty-six billion, seven hundred two million, four hundred seven thousand, three hundred sixty-nine".