666612281088 has 432 divisors, whose sum is σ = 2239904808960. Its totient is φ = 196188106752.

The previous prime is 666612281063. The next prime is 666612281113. The reversal of 666612281088 is 880182216666.

It is an interprime number because it is at equal distance from previous prime (666612281063) and next prime (666612281113).

It is a tau number, because it is divible by the number of its divisors (432).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18582273 + ... + 18618111.

Almost surely, 2^666612281088 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 666612281088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119952404480).

666612281088 is an abundant number, since it is smaller than the sum of its proper divisors (1573292527872).

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

666612281088 is a wasteful number, since it uses less digits than its factorization.

666612281088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35906 (or 35880 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 666612281088 in words is "six hundred sixty-six billion, six hundred twelve million, two hundred eighty-one thousand, eighty-eight".