66566552361 has 8 divisors (see below), whose sum is σ = 88800259680. Its totient is φ = 44355273312.

The previous prime is 66566552341. The next prime is 66566552387. The reversal of 66566552361 is 16325566566.

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

It is not a de Polignac number, because 66566552361 - 2⁵ = 66566552329 is a prime.

It is a super-2 number, since 2×66566552361² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66566552341) 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, 5600140 + ... + 5612013.

It is an arithmetic number, because the mean of its divisors is an integer number (11100032460).

Almost surely, 2^66566552361 is an apocalyptic number.

It is an amenable number.

66566552361 is a deficient number, since it is larger than the sum of its proper divisors (22233707319).

66566552361 is a wasteful number, since it uses less digits than its factorization.

66566552361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214135.

The product of its digits is 5832000, while the sum is 51.

The spelling of 66566552361 in words is "sixty-six billion, five hundred sixty-six million, five hundred fifty-two thousand, three hundred sixty-one".