66653658830 has 32 divisors (see below), whose sum is σ = 131194526688. Its totient is φ = 24180105600.

The previous prime is 66653658823. The next prime is 66653658853. The reversal of 66653658830 is 3885635666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673337 + ... + 765956.

It is an arithmetic number, because the mean of its divisors is an integer number (4099828959).

Almost surely, 2^66653658830 is an apocalyptic number.

66653658830 is a deficient number, since it is larger than the sum of its proper divisors (64540867858).

66653658830 is a wasteful number, since it uses less digits than its factorization.

66653658830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439732.

The product of its (nonzero) digits is 18662400, while the sum is 56.

The spelling of 66653658830 in words is "sixty-six billion, six hundred fifty-three million, six hundred fifty-eight thousand, eight hundred thirty".