666027615405131 has 16 divisors (see below), whose sum is σ = 780235981152768. Its totient is φ = 556602366753600.

The previous prime is 666027615405037. The next prime is 666027615405181. The reversal of 666027615405131 is 131504516720666.

It is a cyclic number.

It is not a de Polignac number, because 666027615405131 - 2¹⁴ = 666027615388747 is a prime.

It is a super-3 number, since 3×666027615405131³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (666027615405181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738140375 + ... + 739042128.

It is an arithmetic number, because the mean of its divisors is an integer number (48764748822048).

Almost surely, 2^{666027615405131} is an apocalyptic number.

666027615405131 is a deficient number, since it is larger than the sum of its proper divisors (114208365747637).

666027615405131 is a wasteful number, since it uses less digits than its factorization.

666027615405131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477184122.

The product of its (nonzero) digits is 5443200, while the sum is 53.

The spelling of 666027615405131 in words is "six hundred sixty-six trillion, twenty-seven billion, six hundred fifteen million, four hundred five thousand, one hundred thirty-one".