66803532724 has 24 divisors (see below), whose sum is σ = 124498547208. Its totient is φ = 31255234560.

The previous prime is 66803532701. The next prime is 66803532749. The reversal of 66803532724 is 42723530866.

It can be written as a sum of positive squares in 4 ways, for example, as 43856736400 + 22946796324 = 209420^2 + 151482^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2827557 + ... + 2851084.

It is an arithmetic number, because the mean of its divisors is an integer number (5187439467).

Almost surely, 2^66803532724 is an apocalyptic number.

It is an amenable number.

66803532724 is a deficient number, since it is larger than the sum of its proper divisors (57695014484).

66803532724 is a wasteful number, since it uses less digits than its factorization.

66803532724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5678835 (or 5678833 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 66803532724 in words is "sixty-six billion, eight hundred three million, five hundred thirty-two thousand, seven hundred twenty-four".