66803532723 has 12 divisors (see below), whose sum is σ = 97379259120. Its totient is φ = 44127103536.

The previous prime is 66803532701. The next prime is 66803532749. The reversal of 66803532723 is 32723530866.

It is a de Polignac number, because none of the positive numbers 2^k-66803532723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66803532793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34047711 + ... + 34049672.

It is an arithmetic number, because the mean of its divisors is an integer number (8114938260).

Almost surely, 2^66803532723 is an apocalyptic number.

66803532723 is a deficient number, since it is larger than the sum of its proper divisors (30575726397).

66803532723 is a wasteful number, since it uses less digits than its factorization.

66803532723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68097498 (or 68097495 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 66803532723 in words is "sixty-six billion, eight hundred three million, five hundred thirty-two thousand, seven hundred twenty-three".