666137500517366 has 8 divisors (see below), whose sum is σ = 1013279578251984. Its totient is φ = 328377641100040.

The previous prime is 666137500517309. The next prime is 666137500517381. The reversal of 666137500517366 is 663715005731666.

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

It is a junction number, because it is equal to n+sod(n) for n = 666137500517299 and 666137500517308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345554579145 + ... + 2345554579428.

It is an arithmetic number, because the mean of its divisors is an integer number (126659947281498).

Almost surely, 2^{666137500517366} is an apocalyptic number.

666137500517366 is a deficient number, since it is larger than the sum of its proper divisors (347142077734618).

666137500517366 is a wasteful number, since it uses less digits than its factorization.

666137500517366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691109158646.

The product of its (nonzero) digits is 85730400, while the sum is 62.

The spelling of 666137500517366 in words is "six hundred sixty-six trillion, one hundred thirty-seven billion, five hundred million, five hundred seventeen thousand, three hundred sixty-six".