6665652941220 has 1728 divisors, whose sum is σ = 27072822067200. Its totient is φ = 1346492160000.

The previous prime is 6665652941203. The next prime is 6665652941221. The reversal of 6665652941220 is 221492565666.

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

It is not an unprimeable number, because it can be changed into a prime (6665652941221) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 26556386095 + ... + 26556386345.

It is an arithmetic number, because the mean of its divisors is an integer number (15667142400).

Almost surely, 2^{6665652941220} is an apocalyptic number.

6665652941220 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 6665652941220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13536411033600).

6665652941220 is an abundant number, since it is smaller than the sum of its proper divisors (20407169125980).

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

6665652941220 is a wasteful number, since it uses less digits than its factorization.

6665652941220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 6665652941220 in words is "six trillion, six hundred sixty-five billion, six hundred fifty-two million, nine hundred forty-one thousand, two hundred twenty".