666587000785601 has 8 divisors (see below), whose sum is σ = 763081292085504. Its totient is φ = 570409603711200.

The previous prime is 666587000785577. The next prime is 666587000785609. The reversal of 666587000785601 is 106587000785666.

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

It is a cyclic number.

It is not a de Polignac number, because 666587000785601 - 2³⁸ = 666312122878657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666587000785609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79223551865 + ... + 79223560278.

It is an arithmetic number, because the mean of its divisors is an integer number (95385161510688).

Almost surely, 2^{666587000785601} is an apocalyptic number.

It is an amenable number.

666587000785601 is a deficient number, since it is larger than the sum of its proper divisors (96494291299903).

666587000785601 is a wasteful number, since it uses less digits than its factorization.

666587000785601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158447112751.

The product of its (nonzero) digits is 101606400, while the sum is 65.

Adding to 666587000785601 its sum of digits (65), we get a palindrome (666587000785666).

The spelling of 666587000785601 in words is "six hundred sixty-six trillion, five hundred eighty-seven billion, seven hundred eighty-five thousand, six hundred one".