6699690 has 24 divisors (see below), whose sum is σ = 17419428. Its totient is φ = 1786560.

The previous prime is 6699643. The next prime is 6699703. The reversal of 6699690 is 969966.

It can be written as a sum of positive squares in 2 ways, for example, as 6095961 + 603729 = 2469^2 + 777^2 .

It is a super-2 number, since 2×6699690² = 89771692192200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37131 + ... + 37310.

Almost surely, 2^6699690 is an apocalyptic number.

6699690 is an abundant number, since it is smaller than the sum of its proper divisors (10719738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6699690 is a wasteful number, since it uses less digits than its factorization.

6699690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74454 (or 74451 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 6699690 is about 2588.3759386921. The cubic root of 6699690 is about 188.5174555293.

The spelling of 6699690 in words is "six million, six hundred ninety-nine thousand, six hundred ninety".