63666536885 has 32 divisors (see below), whose sum is σ = 92777156352. Its totient is φ = 40943692800.

The previous prime is 63666536837. The next prime is 63666536903. The reversal of 63666536885 is 58863566636.

It is a happy number.

63666536885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63666536885 - 2⁸ = 63666536629 is a prime.

It is a super-3 number, since 3×63666536885³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20666 + ... + 357435.

It is an arithmetic number, because the mean of its divisors is an integer number (2899286136).

Almost surely, 2^63666536885 is an apocalyptic number.

It is an amenable number.

63666536885 is a deficient number, since it is larger than the sum of its proper divisors (29110619467).

63666536885 is a wasteful number, since it uses less digits than its factorization.

63666536885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378413.

The product of its digits is 111974400, while the sum is 62.

The spelling of 63666536885 in words is "sixty-three billion, six hundred sixty-six million, five hundred thirty-six thousand, eight hundred eighty-five".