6687074499839 has 4 divisors (see below), whose sum is σ = 6690370250760. Its totient is φ = 6683778748920.

The previous prime is 6687074499773. The next prime is 6687074499883. The reversal of 6687074499839 is 9389944707866.

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

It is a cyclic number.

It is not a de Polignac number, because 6687074499839 - 2²⁴ = 6687057722623 is a prime.

It is a super-2 number, since 2×6687074499839² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687074499139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647872417 + ... + 1647876474.

It is an arithmetic number, because the mean of its divisors is an integer number (1672592562690).

Almost surely, 2^{6687074499839} is an apocalyptic number.

6687074499839 is a deficient number, since it is larger than the sum of its proper divisors (3295750921).

6687074499839 is a wasteful number, since it uses less digits than its factorization.

6687074499839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295750920.

The product of its (nonzero) digits is 3950456832, while the sum is 80.

The spelling of 6687074499839 in words is "six trillion, six hundred eighty-seven billion, seventy-four million, four hundred ninety-nine thousand, eight hundred thirty-nine".