66283528616 has 8 divisors (see below), whose sum is σ = 124281616170. Its totient is φ = 33141764304.

The previous prime is 66283528613. The next prime is 66283528631. The reversal of 66283528616 is 61682538266.

It can be written as a sum of positive squares in only one way, i.e., 41083236100 + 25200292516 = 202690^2 + 158746^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66283528613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4142720531 + ... + 4142720546.

Almost surely, 2^66283528616 is an apocalyptic number.

It is an amenable number.

66283528616 is a deficient number, since it is larger than the sum of its proper divisors (57998087554).

66283528616 is a wasteful number, since it uses less digits than its factorization.

66283528616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8285441083 (or 8285441079 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The spelling of 66283528616 in words is "sixty-six billion, two hundred eighty-three million, five hundred twenty-eight thousand, six hundred sixteen".