6666598488 has 64 divisors (see below), whose sum is σ = 18240318720. Its totient is φ = 2013660800.

The previous prime is 6666598447. The next prime is 6666598559. The reversal of 6666598488 is 8848956666.

It is a super-2 number, since 2×6666598488² = 88887070800407772288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

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, 41506 + ... + 122702.

It is an arithmetic number, because the mean of its divisors is an integer number (285004980).

Almost surely, 2^6666598488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666598488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9120159360).

6666598488 is an abundant number, since it is smaller than the sum of its proper divisors (11573720232).

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

6666598488 is a wasteful number, since it uses less digits than its factorization.

6666598488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81528 (or 81524 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 66.

The square root of 6666598488 is about 81649.2405843435. The cubic root of 6666598488 is about 1882.0656418820.

The spelling of 6666598488 in words is "six billion, six hundred sixty-six million, five hundred ninety-eight thousand, four hundred eighty-eight".