6696634317985 has 4 divisors (see below), whose sum is σ = 8035961181588. Its totient is φ = 5357307454384.

The previous prime is 6696634317881. The next prime is 6696634318013. The reversal of 6696634317985 is 5897134366966.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2206083413521 + 4490550904464 = 1485289^2 + 2119092^2 .

It is a cyclic number.

It is not a de Polignac number, because 6696634317985 - 2¹³ = 6696634309793 is a prime.

It is a super-2 number, since 2×6696634317985² (a number of 26 digits) contains 22 as substring.

It is a Duffinian 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, 669663431794 + ... + 669663431803.

It is an arithmetic number, because the mean of its divisors is an integer number (2008990295397).

Almost surely, 2^{6696634317985} is an apocalyptic number.

It is an amenable number.

6696634317985 is a deficient number, since it is larger than the sum of its proper divisors (1339326863603).

6696634317985 is a wasteful number, since it uses less digits than its factorization.

6696634317985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339326863602.

The product of its digits is 1058158080, while the sum is 73.

The spelling of 6696634317985 in words is "six trillion, six hundred ninety-six billion, six hundred thirty-four million, three hundred seventeen thousand, nine hundred eighty-five".