66566552266 has 8 divisors (see below), whose sum is σ = 103292926020. Its totient is φ = 32135576928.

The previous prime is 66566552257. The next prime is 66566552323. The reversal of 66566552266 is 66225566566.

It can be written as a sum of positive squares in 2 ways, for example, as 62789835241 + 3776717025 = 250579^2 + 61455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66566552266² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573849531 + ... + 573849646.

Almost surely, 2^66566552266 is an apocalyptic number.

66566552266 is a deficient number, since it is larger than the sum of its proper divisors (36726373754).

66566552266 is a wasteful number, since it uses less digits than its factorization.

66566552266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147699208.

The product of its digits is 23328000, while the sum is 55.

The spelling of 66566552266 in words is "sixty-six billion, five hundred sixty-six million, five hundred fifty-two thousand, two hundred sixty-six".