666036450501405 has 8 divisors (see below), whose sum is σ = 1065658320802272. Its totient is φ = 355219440267408.

The previous prime is 666036450501371. The next prime is 666036450501421. The reversal of 666036450501405 is 504105054630666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666036450501405 - 2¹² = 666036450497309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22201215016699 + ... + 22201215016728.

It is an arithmetic number, because the mean of its divisors is an integer number (133207290100284).

Almost surely, 2^{666036450501405} is an apocalyptic number.

It is an amenable number.

666036450501405 is a deficient number, since it is larger than the sum of its proper divisors (399621870300867).

666036450501405 is a wasteful number, since it uses less digits than its factorization.

666036450501405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44402430033435.

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 666036450501405 in words is "six hundred sixty-six trillion, thirty-six billion, four hundred fifty million, five hundred one thousand, four hundred five".