6690406268 has 48 divisors (see below), whose sum is σ = 14482675200. Its totient is φ = 2633425344.

The previous prime is 6690406259. The next prime is 6690406277. The reversal of 6690406268 is 8626040966.

It is an interprime number because it is at equal distance from previous prime (6690406259) and next prime (6690406277).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26255 + ... + 118617.

It is an arithmetic number, because the mean of its divisors is an integer number (301722400).

Almost surely, 2^6690406268 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6690406268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7241337600).

6690406268 is an abundant number, since it is smaller than the sum of its proper divisors (7792268932).

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

6690406268 is a wasteful number, since it uses less digits than its factorization.

6690406268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92586 (or 92584 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 6690406268 is about 81794.9036798748. The cubic root of 6690406268 is about 1884.3033933199.

The spelling of 6690406268 in words is "six billion, six hundred ninety million, four hundred six thousand, two hundred sixty-eight".