66040560255 has 8 divisors (see below), whose sum is σ = 105664896432. Its totient is φ = 35221632128.

The previous prime is 66040560247. The next prime is 66040560277. The reversal of 66040560255 is 55206504066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66040560255 - 2³ = 66040560247 is a prime.

It is a super-2 number, since 2×66040560255² (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 7 ways as a sum of consecutive naturals, for example, 2201351994 + ... + 2201352023.

It is an arithmetic number, because the mean of its divisors is an integer number (13208112054).

Almost surely, 2^66040560255 is an apocalyptic number.

66040560255 is a deficient number, since it is larger than the sum of its proper divisors (39624336177).

66040560255 is a wasteful number, since it uses less digits than its factorization.

66040560255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4402704025.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 66040560255 in words is "sixty-six billion, forty million, five hundred sixty thousand, two hundred fifty-five".