685866276001 has 4 divisors (see below), whose sum is σ = 689457199104. Its totient is φ = 682275352900.

The previous prime is 685866275977. The next prime is 685866276019. The reversal of 685866276001 is 100672668586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685866276001 - 2¹⁵ = 685866243233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685866256001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1795461265 + ... + 1795461646.

It is an arithmetic number, because the mean of its divisors is an integer number (172364299776).

Almost surely, 2^685866276001 is an apocalyptic number.

It is an amenable number.

685866276001 is a deficient number, since it is larger than the sum of its proper divisors (3590923103).

685866276001 is a wasteful number, since it uses less digits than its factorization.

685866276001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590923102.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 685866276001 in words is "six hundred eighty-five billion, eight hundred sixty-six million, two hundred seventy-six thousand, one".