66298748418 has 36 divisors (see below), whose sum is σ = 167099908950. Its totient is φ = 18942499296.

The previous prime is 66298748413. The next prime is 66298748423. The reversal of 66298748418 is 81484789266.

66298748418 is a `hidden beast` number, since 6 + 62 + 9 + 87 + 484 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (66298748413) and next prime (66298748423).

It can be written as a sum of positive squares in only one way, i.e., 45406069569 + 20892678849 = 213087^2 + 144543^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (66298748413) 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, 37583443 + ... + 37585206.

Almost surely, 2^66298748418 is an apocalyptic number.

66298748418 is an abundant number, since it is smaller than the sum of its proper divisors (100801160532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66298748418 is a wasteful number, since it uses less digits than its factorization.

66298748418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75168671 (or 75168661 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 66298748418 in words is "sixty-six billion, two hundred ninety-eight million, seven hundred forty-eight thousand, four hundred eighteen".