66250542843 has 8 divisors (see below), whose sum is σ = 98148952400. Its totient is φ = 44167028544.

The previous prime is 66250542811. The next prime is 66250542847. The reversal of 66250542843 is 34824505266.

66250542843 is a `hidden beast` number, since 6 + 6 + 25 + 0 + 542 + 84 + 3 = 666.

It is not a de Polignac number, because 66250542843 - 2⁵ = 66250542811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66250542847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1226861878 + ... + 1226861931.

It is an arithmetic number, because the mean of its divisors is an integer number (12268619050).

Almost surely, 2^66250542843 is an apocalyptic number.

66250542843 is a deficient number, since it is larger than the sum of its proper divisors (31898409557).

66250542843 is a wasteful number, since it uses less digits than its factorization.

66250542843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453723818 (or 2453723812 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 66250542843 in words is "sixty-six billion, two hundred fifty million, five hundred forty-two thousand, eight hundred forty-three".