66111661036 has 12 divisors (see below), whose sum is σ = 116282694528. Its totient is φ = 32888034032.

The previous prime is 66111661019. The next prime is 66111661039. The reversal of 66111661036 is 63016611166.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66111660986 and 66111661004.

It is not an unprimeable number, because it can be changed into a prime (66111661039) 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, 41948236 + ... + 41949811.

It is an arithmetic number, because the mean of its divisors is an integer number (9690224544).

Almost surely, 2^66111661036 is an apocalyptic number.

It is an amenable number.

66111661036 is a deficient number, since it is larger than the sum of its proper divisors (50171033492).

66111661036 is a wasteful number, since it uses less digits than its factorization.

66111661036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83898248 (or 83898246 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 66111661036 in words is "sixty-six billion, one hundred eleven million, six hundred sixty-one thousand, thirty-six".