66251030863 has 4 divisors (see below), whose sum is σ = 66525931648. Its totient is φ = 65976130080.

The previous prime is 66251030843. The next prime is 66251030927. The reversal of 66251030863 is 36803015266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66251030863 - 2⁵ = 66251030831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66251030843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137450031 + ... + 137450512.

It is an arithmetic number, because the mean of its divisors is an integer number (16631482912).

Almost surely, 2^66251030863 is an apocalyptic number.

66251030863 is a deficient number, since it is larger than the sum of its proper divisors (274900785).

66251030863 is a wasteful number, since it uses less digits than its factorization.

66251030863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274900784.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 66251030863 in words is "sixty-six billion, two hundred fifty-one million, thirty thousand, eight hundred sixty-three".