666243552667150 has 24 divisors (see below), whose sum is σ = 1242482699310120. Its totient is φ = 265794261636960.

The previous prime is 666243552667051. The next prime is 666243552667157. The reversal of 666243552667150 is 51766255342666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666243552667157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17578966609 + ... + 17579004508.

It is an arithmetic number, because the mean of its divisors is an integer number (51770112471255).

Almost surely, 2^{666243552667150} is an apocalyptic number.

666243552667150 is a deficient number, since it is larger than the sum of its proper divisors (576239146642970).

666243552667150 is a wasteful number, since it uses less digits than its factorization.

666243552667150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35157971508 (or 35157971503 counting only the distinct ones).

The product of its (nonzero) digits is 326592000, while the sum is 64.

The spelling of 666243552667150 in words is "six hundred sixty-six trillion, two hundred forty-three billion, five hundred fifty-two million, six hundred sixty-seven thousand, one hundred fifty".