666263066425 has 48 divisors (see below), whose sum is σ = 910610288640. Its totient is φ = 479559528000.

The previous prime is 666263066393. The next prime is 666263066429. The reversal of 666263066425 is 524660362666.

It is not a de Polignac number, because 666263066425 - 2⁵ = 666263066393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666263066429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10682080 + ... + 10744270.

It is an arithmetic number, because the mean of its divisors is an integer number (18971047680).

Almost surely, 2^666263066425 is an apocalyptic number.

It is an amenable number.

666263066425 is a deficient number, since it is larger than the sum of its proper divisors (244347222215).

666263066425 is a wasteful number, since it uses less digits than its factorization.

666263066425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62614 (or 62609 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 52.

The spelling of 666263066425 in words is "six hundred sixty-six billion, two hundred sixty-three million, sixty-six thousand, four hundred twenty-five".