66662102787 has 16 divisors (see below), whose sum is σ = 102262099200. Its totient is φ = 37836973152.

The previous prime is 66662102779. The next prime is 66662102789. The reversal of 66662102787 is 78720126666.

It is not a de Polignac number, because 66662102787 - 2³ = 66662102779 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 10649173 + ... + 10655430.

It is an arithmetic number, because the mean of its divisors is an integer number (6391381200).

Almost surely, 2^66662102787 is an apocalyptic number.

66662102787 is a deficient number, since it is larger than the sum of its proper divisors (35599996413).

66662102787 is a wasteful number, since it uses less digits than its factorization.

66662102787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21304762.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 66662102787 in words is "sixty-six billion, six hundred sixty-two million, one hundred two thousand, seven hundred eighty-seven".