666552499200 has 792 divisors, whose sum is σ = 2828716089472. Its totient is φ = 152344903680.

The previous prime is 666552499127. The next prime is 666552499229. The reversal of 666552499200 is 2994255666.

666552499200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 71 ways as a sum of consecutive naturals, for example, 43537947 + ... + 43553253.

Almost surely, 2^666552499200 is an apocalyptic number.

666552499200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666552499200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1414358044736).

666552499200 is an abundant number, since it is smaller than the sum of its proper divisors (2162163590272).

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

666552499200 is a wasteful number, since it uses less digits than its factorization.

666552499200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15359 (or 15324 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 666552499200 in words is "six hundred sixty-six billion, five hundred fifty-two million, four hundred ninety-nine thousand, two hundred".