6696690 has 128 divisors (see below), whose sum is σ = 21676032. Its totient is φ = 1278720.

The previous prime is 6696673. The next prime is 6696707. The reversal of 6696690 is 966966.

6696690 = 53² + 54² + ... + 272².

It is an interprime number because it is at equal distance from previous prime (6696673) and next prime (6696707).

It is a super-2 number, since 2×6696690² = 89691313912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29919 + ... + 30141.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

Almost surely, 2^6696690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6696690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10838016).

6696690 is an abundant number, since it is smaller than the sum of its proper divisors (14979342).

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

6696690 is a wasteful number, since it uses less digits than its factorization.

6696690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 6696690 is about 2587.7963598398. The cubic root of 6696690 is about 188.4893130927.

It can be divided in two parts, 6 and 696690, that added together give a palindrome (696696).

The spelling of 6696690 in words is "six million, six hundred ninety-six thousand, six hundred ninety".