6666661150551 has 96 divisors (see below), whose sum is σ = 9953605995840. Its totient is φ = 4298139648000.

The previous prime is 6666661150543. The next prime is 6666661150553. The reversal of 6666661150551 is 1550511666666.

It is not a de Polignac number, because 6666661150551 - 2³ = 6666661150543 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666661150553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5046676971 + ... + 5046678291.

It is an arithmetic number, because the mean of its divisors is an integer number (103683395790).

Almost surely, 2^{6666661150551} is an apocalyptic number.

6666661150551 is a deficient number, since it is larger than the sum of its proper divisors (3286944845289).

6666661150551 is a wasteful number, since it uses less digits than its factorization.

6666661150551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 6666661150551 in words is "six trillion, six hundred sixty-six billion, six hundred sixty-one million, one hundred fifty thousand, five hundred fifty-one".