6669792780 has 192 divisors, whose sum is σ = 22288358400. Its totient is φ = 1488872448.

The previous prime is 6669792749. The next prime is 6669792781. The reversal of 6669792780 is 872979666.

It is a super-2 number, since 2×6669792780² = 88972271456280256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (6669792781) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 881172 + ... + 888708.

It is an arithmetic number, because the mean of its divisors is an integer number (116085200).

Almost surely, 2^6669792780 is an apocalyptic number.

6669792780 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 6669792780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11144179200).

6669792780 is an abundant number, since it is smaller than the sum of its proper divisors (15618565620).

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

6669792780 is a wasteful number, since it uses less digits than its factorization.

6669792780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7613 (or 7597 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 60.

The square root of 6669792780 is about 81668.7993054875. The cubic root of 6669792780 is about 1882.3661903200.

The spelling of 6669792780 in words is "six billion, six hundred sixty-nine million, seven hundred ninety-two thousand, seven hundred eighty".