6689627494 has 16 divisors (see below), whose sum is σ = 10960600896. Its totient is φ = 3036868200.

The previous prime is 6689627489. The next prime is 6689627501. The reversal of 6689627494 is 4947269866.

It is a super-2 number, since 2×6689627494² = 89502232016961440072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175872 + ... + 210499.

It is an arithmetic number, because the mean of its divisors is an integer number (685037556).

Almost surely, 2^6689627494 is an apocalyptic number.

6689627494 is a deficient number, since it is larger than the sum of its proper divisors (4270973402).

6689627494 is a wasteful number, since it uses less digits than its factorization.

6689627494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387171.

The product of its digits is 31352832, while the sum is 61.

The square root of 6689627494 is about 81790.1430124682. The cubic root of 6689627494 is about 1884.2302785058.

The spelling of 6689627494 in words is "six billion, six hundred eighty-nine million, six hundred twenty-seven thousand, four hundred ninety-four".