66902577609 has 48 divisors (see below), whose sum is σ = 103572163968. Its totient is φ = 37629805824.

The previous prime is 66902577551. The next prime is 66902577641. The reversal of 66902577609 is 90677520966.

It is a happy number.

It is not a de Polignac number, because 66902577609 - 2¹² = 66902573513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66902577509) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 59894319 + ... + 59895435.

It is an arithmetic number, because the mean of its divisors is an integer number (2157753416).

Almost surely, 2^66902577609 is an apocalyptic number.

It is an amenable number.

66902577609 is a deficient number, since it is larger than the sum of its proper divisors (36669586359).

66902577609 is a wasteful number, since it uses less digits than its factorization.

66902577609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742 (or 1663 counting only the distinct ones).

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 66902577609 in words is "sixty-six billion, nine hundred two million, five hundred seventy-seven thousand, six hundred nine".