66344365476 has 27 divisors (see below), whose sum is σ = 167707719361. Its totient is φ = 22114273344.

The previous prime is 66344365469. The next prime is 66344365481. The reversal of 66344365476 is 67456344366.

The square root of 66344365476 is 257574.

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

66344365476 is a `hidden beast` number, since 6 + 63 + 4 + 4 + 36 + 547 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 66316550400 = 5274^2 + 257520^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1523980 + ... + 1566908.

Almost surely, 2^66344365476 is an apocalyptic number.

66344365476 is the 257574-th square number.

It is an amenable number.

66344365476 is an abundant number, since it is smaller than the sum of its proper divisors (101363353885).

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

66344365476 is an frugal number, since it uses more digits than its factorization.

66344365476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85868 (or 42934 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 54.

The spelling of 66344365476 in words is "sixty-six billion, three hundred forty-four million, three hundred sixty-five thousand, four hundred seventy-six".