685966490201 has 8 divisors (see below), whose sum is σ = 693023958120. Its totient is φ = 678938738688.

The previous prime is 685966490149. The next prime is 685966490203. The reversal of 685966490201 is 102094669586.

It can be written as a sum of positive squares in 4 ways, for example, as 252049182025 + 433917308176 = 502045^2 + 658724^2 .

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 685966490201 - 2²² = 685962295897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685966490203) 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, 7382696 + ... + 7475033.

It is an arithmetic number, because the mean of its divisors is an integer number (86627994765).

Almost surely, 2^685966490201 is an apocalyptic number.

It is an amenable number.

685966490201 is a deficient number, since it is larger than the sum of its proper divisors (7057467919).

685966490201 is a wasteful number, since it uses less digits than its factorization.

685966490201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14858203.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 685966490201 in words is "six hundred eighty-five billion, nine hundred sixty-six million, four hundred ninety thousand, two hundred one".