66474212077 has 18 divisors (see below), whose sum is σ = 83732954058. Its totient is φ = 52594974432.

The previous prime is 66474212071. The next prime is 66474212089. The reversal of 66474212077 is 77021247466.

It can be written as a sum of positive squares in 3 ways, for example, as 7684450921 + 58789761156 = 87661^2 + 242466^2 .

It is not a de Polignac number, because 66474212077 - 2¹¹ = 66474210029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66474212071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4005378 + ... + 4021939.

It is an arithmetic number, because the mean of its divisors is an integer number (4651830781).

Almost surely, 2^66474212077 is an apocalyptic number.

It is an amenable number.

66474212077 is a deficient number, since it is larger than the sum of its proper divisors (17258741981).

66474212077 is a wasteful number, since it uses less digits than its factorization.

66474212077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027357 (or 8027337 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 46.

The spelling of 66474212077 in words is "sixty-six billion, four hundred seventy-four million, two hundred twelve thousand, seventy-seven".