6651099922320 has 800 divisors, whose sum is σ = 27485741657088. Its totient is φ = 1458874146816.

The previous prime is 6651099922309. The next prime is 6651099922399. The reversal of 6651099922320 is 232299901566.

It is a happy number.

6651099922320 is a `hidden beast` number, since 6 + 6 + 510 + 9 + 9 + 92 + 2 + 32 + 0 = 666.

It is a super-2 number, since 2×6651099922320² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 122490217 + ... + 122544503.

Almost surely, 2^{6651099922320} is an apocalyptic number.

6651099922320 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 6651099922320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13742870828544).

6651099922320 is an abundant number, since it is smaller than the sum of its proper divisors (20834641734768).

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

6651099922320 is a wasteful number, since it uses less digits than its factorization.

6651099922320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54429 (or 54414 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 6651099922320 in words is "six trillion, six hundred fifty-one billion, ninety-nine million, nine hundred twenty-two thousand, three hundred twenty".