669855785635 has 16 divisors (see below), whose sum is σ = 852796108800. Its totient is φ = 503682683616.

The previous prime is 669855785629. The next prime is 669855785659. The reversal of 669855785635 is 536587558966.

It is a cyclic number.

It is not a de Polignac number, because 669855785635 - 2¹³ = 669855777443 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27748225 + ... + 27772354.

It is an arithmetic number, because the mean of its divisors is an integer number (53299756800).

Almost surely, 2^669855785635 is an apocalyptic number.

669855785635 is a deficient number, since it is larger than the sum of its proper divisors (182940323165).

669855785635 is a wasteful number, since it uses less digits than its factorization.

669855785635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55520730.

The product of its digits is 1632960000, while the sum is 73.

The spelling of 669855785635 in words is "six hundred sixty-nine billion, eight hundred fifty-five million, seven hundred eighty-five thousand, six hundred thirty-five".