66030363861 has 32 divisors (see below), whose sum is σ = 110005122048. Its totient is φ = 34226375040.

The previous prime is 66030363857. The next prime is 66030363863. The reversal of 66030363861 is 16836303066.

It is a happy number.

It is not a de Polignac number, because 66030363861 - 2² = 66030363857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66030363863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207175 + ... + 418308.

It is an arithmetic number, because the mean of its divisors is an integer number (3437660064).

Almost surely, 2^66030363861 is an apocalyptic number.

It is an amenable number.

66030363861 is a deficient number, since it is larger than the sum of its proper divisors (43974758187).

66030363861 is a wasteful number, since it uses less digits than its factorization.

66030363861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625961.

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 66030363861 in words is "sixty-six billion, thirty million, three hundred sixty-three thousand, eight hundred sixty-one".