66560006566 has 32 divisors (see below), whose sum is σ = 104148182016. Its totient is φ = 31867020000.

The previous prime is 66560006533. The next prime is 66560006587.

66560006566 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66560006566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14844961 + ... + 14849443.

It is an arithmetic number, because the mean of its divisors is an integer number (3254630688).

Almost surely, 2^66560006566 is an apocalyptic number.

66560006566 is a deficient number, since it is larger than the sum of its proper divisors (37588175450).

66560006566 is a wasteful number, since it uses less digits than its factorization.

66560006566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6988.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 66560006566 in words is "sixty-six billion, five hundred sixty million, six thousand, five hundred sixty-six".