666402852038587 has 2 divisors, whose sum is σ = 666402852038588. Its totient is φ = 666402852038586.

The previous prime is 666402852038549. The next prime is 666402852038597. The reversal of 666402852038587 is 785830258204666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666402852038587 - 2³¹ = 666400704554939 is a prime.

It is a super-2 number, since 2×666402852038587² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666402852038527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333201426019293 + 333201426019294.

It is an arithmetic number, because the mean of its divisors is an integer number (333201426019294).

Almost surely, 2^{666402852038587} is an apocalyptic number.

666402852038587 is a deficient number, since it is larger than the sum of its proper divisors (1).

666402852038587 is an equidigital number, since it uses as much as digits as its factorization.

666402852038587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 928972800, while the sum is 70.

The spelling of 666402852038587 in words is "six hundred sixty-six trillion, four hundred two billion, eight hundred fifty-two million, thirty-eight thousand, five hundred eighty-seven".