6661220756514 has 32 divisors (see below), whose sum is σ = 13782275997120. Its totient is φ = 2143772726592.

The previous prime is 6661220756459. The next prime is 6661220756569. The reversal of 6661220756514 is 4156570221666.

It is an interprime number because it is at equal distance from previous prime (6661220756459) and next prime (6661220756569).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5003149 + ... + 6193055.

It is an arithmetic number, because the mean of its divisors is an integer number (430696124910).

Almost surely, 2^{6661220756514} is an apocalyptic number.

6661220756514 is an abundant number, since it is smaller than the sum of its proper divisors (7121055240606).

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

6661220756514 is a wasteful number, since it uses less digits than its factorization.

6661220756514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222114.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 6661220756514 in words is "six trillion, six hundred sixty-one billion, two hundred twenty million, seven hundred fifty-six thousand, five hundred fourteen".