6695090640 has 400 divisors, whose sum is σ = 26851638528. Its totient is φ = 1514391552.

The previous prime is 6695090617. The next prime is 6695090659. The reversal of 6695090640 is 460905966.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4671364 + ... + 4672796.

Almost surely, 2^6695090640 is an apocalyptic number.

6695090640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6695090640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13425819264).

6695090640 is an abundant number, since it is smaller than the sum of its proper divisors (20156547888).

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

6695090640 is a wasteful number, since it uses less digits than its factorization.

6695090640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 6695090640 is about 81823.5335340634. The cubic root of 6695090640 is about 1884.7430636201.

The spelling of 6695090640 in words is "six billion, six hundred ninety-five million, ninety thousand, six hundred forty".