66638553530662 has 16 divisors (see below), whose sum is σ = 100338958137600. Its totient is φ = 33192257701120.

The previous prime is 66638553530657. The next prime is 66638553530663. The reversal of 66638553530662 is 26603535583666.

It is a junction number, because it is equal to n+sod(n) for n = 66638553530594 and 66638553530603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66638553530663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217414 + ... + 11546617.

It is an arithmetic number, because the mean of its divisors is an integer number (6271184883600).

Almost surely, 2^{66638553530662} is an apocalyptic number.

66638553530662 is a deficient number, since it is larger than the sum of its proper divisors (33700404606938).

66638553530662 is a wasteful number, since it uses less digits than its factorization.

66638553530662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11774831.

The product of its (nonzero) digits is 419904000, while the sum is 64.

The spelling of 66638553530662 in words is "sixty-six trillion, six hundred thirty-eight billion, five hundred fifty-three million, five hundred thirty thousand, six hundred sixty-two".