66255156605 has 16 divisors (see below), whose sum is σ = 87922165824. Its totient is φ = 47525489280.

The previous prime is 66255156593. The next prime is 66255156613. The reversal of 66255156605 is 50665155266.

It is not a de Polignac number, because 66255156605 - 2¹⁴ = 66255140221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66255156605.

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, 8246939 + ... + 8254968.

It is an arithmetic number, because the mean of its divisors is an integer number (5495135364).

Almost surely, 2^66255156605 is an apocalyptic number.

It is an amenable number.

66255156605 is a deficient number, since it is larger than the sum of its proper divisors (21667009219).

66255156605 is a wasteful number, since it uses less digits than its factorization.

66255156605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16501996.

The product of its (nonzero) digits is 1620000, while the sum is 47.

The spelling of 66255156605 in words is "sixty-six billion, two hundred fifty-five million, one hundred fifty-six thousand, six hundred five".