66204791485 has 64 divisors (see below), whose sum is σ = 98771042304. Its totient is φ = 41605344000.

The previous prime is 66204791467. The next prime is 66204791489. The reversal of 66204791485 is 58419740266.

It is not a de Polignac number, because 66204791485 - 2⁵ = 66204791453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66204791489) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2507322 + ... + 2533588.

It is an arithmetic number, because the mean of its divisors is an integer number (1543297536).

Almost surely, 2^66204791485 is an apocalyptic number.

It is an amenable number.

66204791485 is a deficient number, since it is larger than the sum of its proper divisors (32566250819).

66204791485 is a wasteful number, since it uses less digits than its factorization.

66204791485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26434.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 66204791485 in words is "sixty-six billion, two hundred four million, seven hundred ninety-one thousand, four hundred eighty-five".