6899689690 has 16 divisors (see below), whose sum is σ = 12439516320. Its totient is φ = 2755414800.

The previous prime is 6899689673. The next prime is 6899689691. The reversal of 6899689690 is 969869986.

It is a super-2 number, since 2×6899689690² = 95211435636584592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6899689691) 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, 551136 + ... + 563515.

It is an arithmetic number, because the mean of its divisors is an integer number (777469770).

Almost surely, 2^6899689690 is an apocalyptic number.

6899689690 is a deficient number, since it is larger than the sum of its proper divisors (5539826630).

6899689690 is a wasteful number, since it uses less digits than its factorization.

6899689690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115277.

The product of its (nonzero) digits is 90699264, while the sum is 70.

The square root of 6899689690 is about 83064.3707614763. The cubic root of 6899689690 is about 1903.7497223358.

The spelling of 6899689690 in words is "six billion, eight hundred ninety-nine million, six hundred eighty-nine thousand, six hundred ninety".