66610002255 has 16 divisors (see below), whose sum is σ = 107291282400. Its totient is φ = 35286908288.

The previous prime is 66610002233. The next prime is 66610002307. The reversal of 66610002255 is 55220001666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66610002255 - 2⁸ = 66610001999 is a prime.

It is a super-2 number, since 2×66610002255² (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, 14899332 + ... + 14903801.

It is an arithmetic number, because the mean of its divisors is an integer number (6705705150).

Almost surely, 2^66610002255 is an apocalyptic number.

66610002255 is a deficient number, since it is larger than the sum of its proper divisors (40681280145).

66610002255 is a wasteful number, since it uses less digits than its factorization.

66610002255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29803290.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 66610002255 in words is "sixty-six billion, six hundred ten million, two thousand, two hundred fifty-five".