6691698 has 24 divisors (see below), whose sum is σ = 15614508. Its totient is φ = 2058912.

The previous prime is 6691697. The next prime is 6691723. The reversal of 6691698 is 8961966.

It can be written as a sum of positive squares in 2 ways, for example, as 6517809 + 173889 = 2553^2 + 417^2 .

It is a super-3 number, since 3×6691698³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6691697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14065 + ... + 14532.

Almost surely, 2^6691698 is an apocalyptic number.

6691698 is an abundant number, since it is smaller than the sum of its proper divisors (8922810).

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

6691698 is a wasteful number, since it uses less digits than its factorization.

6691698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28618 (or 28615 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 6691698 is about 2586.8316528139. The cubic root of 6691698 is about 188.4424654434.

The spelling of 6691698 in words is "six million, six hundred ninety-one thousand, six hundred ninety-eight".