66662102786 has 16 divisors (see below), whose sum is σ = 103960856160. Its totient is φ = 32032751520.

The previous prime is 66662102779. The next prime is 66662102789. The reversal of 66662102786 is 68720126666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66662102789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6061316 + ... + 6072303.

It is an arithmetic number, because the mean of its divisors is an integer number (6497553510).

Almost surely, 2^66662102786 is an apocalyptic number.

66662102786 is a deficient number, since it is larger than the sum of its proper divisors (37298753374).

66662102786 is a wasteful number, since it uses less digits than its factorization.

66662102786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133729.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 66662102786 in words is "sixty-six billion, six hundred sixty-two million, one hundred two thousand, seven hundred eighty-six".