666257335433740 has 24 divisors (see below), whose sum is σ = 1399327530631632. Its totient is φ = 266467291083840.

The previous prime is 666257335433707. The next prime is 666257335433743. The reversal of 666257335433740 is 47334533752666.

It is not an unprimeable number, because it can be changed into a prime (666257335433743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2227539826 + ... + 2227838905.

It is an arithmetic number, because the mean of its divisors is an integer number (58305313776318).

Almost surely, 2^{666257335433740} is an apocalyptic number.

It is an amenable number.

666257335433740 is an abundant number, since it is smaller than the sum of its proper divisors (733070195197892).

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

666257335433740 is a wasteful number, since it uses less digits than its factorization.

666257335433740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455386217 (or 4455386215 counting only the distinct ones).

The product of its (nonzero) digits is 685843200, while the sum is 64.

The spelling of 666257335433740 in words is "six hundred sixty-six trillion, two hundred fifty-seven billion, three hundred thirty-five million, four hundred thirty-three thousand, seven hundred forty".