66559659670 has 16 divisors (see below), whose sum is σ = 136922728608. Its totient is φ = 22820454720.

The previous prime is 66559659619. The next prime is 66559659697. The reversal of 66559659670 is 7695695566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475426071 + ... + 475426210.

It is an arithmetic number, because the mean of its divisors is an integer number (8557670538).

Almost surely, 2^66559659670 is an apocalyptic number.

66559659670 is an abundant number, since it is smaller than the sum of its proper divisors (70363068938).

66559659670 is a wasteful number, since it uses less digits than its factorization.

66559659670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950852295.

The product of its (nonzero) digits is 91854000, while the sum is 64.

The spelling of 66559659670 in words is "sixty-six billion, five hundred fifty-nine million, six hundred fifty-nine thousand, six hundred seventy".