66392798224 has 45 divisors (see below), whose sum is σ = 132282640791. Its totient is φ = 32280647040.

The previous prime is 66392798221. The next prime is 66392798243. The reversal of 66392798224 is 42289729366.

The square root of 66392798224 is 257668.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5664067600 + 60728730624 = 75260^2 + 246432^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66392798221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 38133994 + ... + 38135734.

Almost surely, 2^66392798224 is an apocalyptic number.

66392798224 is the 257668-th square number.

It is an amenable number.

66392798224 is a deficient number, since it is larger than the sum of its proper divisors (65889842567).

66392798224 is an frugal number, since it uses more digits than its factorization.

66392798224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564 (or 1780 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 58.

The spelling of 66392798224 in words is "sixty-six billion, three hundred ninety-two million, seven hundred ninety-eight thousand, two hundred twenty-four".