6666254032563 has 12 divisors (see below), whose sum is σ = 9630332988328. Its totient is φ = 4443569638560.

The previous prime is 6666254032547. The next prime is 6666254032579. The reversal of 6666254032563 is 3652304526666.

It is an interprime number because it is at equal distance from previous prime (6666254032547) and next prime (6666254032579).

It is not a de Polignac number, because 6666254032563 - 2⁴ = 6666254032547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666254032063) 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, 49905970 + ... + 50039367.

Almost surely, 2^{6666254032563} is an apocalyptic number.

6666254032563 is a deficient number, since it is larger than the sum of its proper divisors (2964078955765).

6666254032563 is a wasteful number, since it uses less digits than its factorization.

6666254032563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99952754 (or 99952751 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 54.

The spelling of 6666254032563 in words is "six trillion, six hundred sixty-six billion, two hundred fifty-four million, thirty-two thousand, five hundred sixty-three".