666627440250 has 128 divisors (see below), whose sum is σ = 1827627909120. Its totient is φ = 161088840000.

The previous prime is 666627440233. The next prime is 666627440257. The reversal of 666627440250 is 52044726666.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666627440250.

It is not an unprimeable number, because it can be changed into a prime (666627440257) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 689226 + ... + 1344725.

It is an arithmetic number, because the mean of its divisors is an integer number (14278343040).

Almost surely, 2^666627440250 is an apocalyptic number.

666627440250 is an abundant number, since it is smaller than the sum of its proper divisors (1161000468870).

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

666627440250 is a wasteful number, since it uses less digits than its factorization.

666627440250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034013 (or 2034003 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 666627440250 in words is "six hundred sixty-six billion, six hundred twenty-seven million, four hundred forty thousand, two hundred fifty".