66807311933476 has 27 divisors (see below), whose sum is σ = 117052882766001. Its totient is φ = 33363679016304.

The previous prime is 66807311933431. The next prime is 66807311933507. The reversal of 66807311933476 is 67433911370866.

The square root of 66807311933476 is 8173574.

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

It can be written as a sum of positive squares in only one way, i.e., 31239447279076 + 35567864654400 = 5589226^2 + 5963880^2 .

It is a Duffinian number.

It is an unprimeable number.

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, 17475099301 + ... + 17475103123.

Almost surely, 2^{66807311933476} is an apocalyptic number.

66807311933476 is the 8173574-th square number.

It is an amenable number.

66807311933476 is a deficient number, since it is larger than the sum of its proper divisors (50245570832525).

66807311933476 is an frugal number, since it uses more digits than its factorization.

66807311933476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788 (or 4894 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 64.

The spelling of 66807311933476 in words is "sixty-six trillion, eight hundred seven billion, three hundred eleven million, nine hundred thirty-three thousand, four hundred seventy-six".