6691255580 has 48 divisors (see below), whose sum is σ = 14404110336. Its totient is φ = 2609789760.

The previous prime is 6691255567. The next prime is 6691255589. The reversal of 6691255580 is 855521966.

It is a super-3 number, since 3×6691255580³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691255589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241607 + ... + 267873.

It is an arithmetic number, because the mean of its divisors is an integer number (300085632).

Almost surely, 2^6691255580 is an apocalyptic number.

It is an amenable number.

6691255580 is an abundant number, since it is smaller than the sum of its proper divisors (7712854756).

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

6691255580 is a wasteful number, since it uses less digits than its factorization.

6691255580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26594 (or 26592 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 47.

The square root of 6691255580 is about 81800.0952322184. The cubic root of 6691255580 is about 1884.3831240919.

The spelling of 6691255580 in words is "six billion, six hundred ninety-one million, two hundred fifty-five thousand, five hundred eighty".