8616069666 has 12 divisors (see below), whose sum is σ = 18668150982. Its totient is φ = 2872023216.

The previous prime is 8616069653. The next prime is 8616069673. The reversal of 8616069666 is 6669606168.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6661987641 + 1954082025 = 81621^2 + 44205^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239335251 + ... + 239335286.

Almost surely, 2^8616069666 is an apocalyptic number.

8616069666 is an abundant number, since it is smaller than the sum of its proper divisors (10052081316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8616069666 is a wasteful number, since it uses less digits than its factorization.

8616069666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478670545 (or 478670542 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The square root of 8616069666 is about 92822.7863511972. The cubic root of 8616069666 is about 2050.0749261530.

The spelling of 8616069666 in words is "eight billion, six hundred sixteen million, sixty-nine thousand, six hundred sixty-six".