666295552 has 72 divisors (see below), whose sum is σ = 1516676616. Its totient is φ = 289406976.

The previous prime is 666295541. The next prime is 666295577. The reversal of 666295552 is 255592666.

666295552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 125081856 + 541213696 = 11184^2 + 23264^2 .

It is a super-2 number, since 2×666295552² = 887899525229969408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50688 + ... + 62464.

It is an arithmetic number, because the mean of its divisors is an integer number (21064953).

Almost surely, 2^666295552 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 666295552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758338308).

666295552 is an abundant number, since it is smaller than the sum of its proper divisors (850381064).

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

666295552 is a wasteful number, since it uses less digits than its factorization.

666295552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11823 (or 11809 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The square root of 666295552 is about 25812.7013696746. The cubic root of 666295552 is about 873.4183353868.

The spelling of 666295552 in words is "six hundred sixty-six million, two hundred ninety-five thousand, five hundred fifty-two".