66315941285 has 16 divisors (see below), whose sum is σ = 90588101760. Its totient is φ = 46132827840.

The previous prime is 66315941273. The next prime is 66315941287. The reversal of 66315941285 is 58214951366.

It is not a de Polignac number, because 66315941285 - 2²² = 66311746981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66315941287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26210570 + ... + 26213099.

It is an arithmetic number, because the mean of its divisors is an integer number (5661756360).

Almost surely, 2^66315941285 is an apocalyptic number.

It is an amenable number.

66315941285 is a deficient number, since it is larger than the sum of its proper divisors (24272160475).

66315941285 is a wasteful number, since it uses less digits than its factorization.

66315941285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52423708.

The product of its digits is 1555200, while the sum is 50.

The spelling of 66315941285 in words is "sixty-six billion, three hundred fifteen million, nine hundred forty-one thousand, two hundred eighty-five".