66600621043 has 8 divisors (see below), whose sum is σ = 73530588096. Its totient is φ = 59816548200.

The previous prime is 66600621029. The next prime is 66600621049. The reversal of 66600621043 is 34012600666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66600621043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66600621049) 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, 36472593 + ... + 36474418.

It is an arithmetic number, because the mean of its divisors is an integer number (9191323512).

Almost surely, 2^66600621043 is an apocalyptic number.

66600621043 is a deficient number, since it is larger than the sum of its proper divisors (6929967053).

66600621043 is a wasteful number, since it uses less digits than its factorization.

66600621043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72947105.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 66600621043 in words is "sixty-six billion, six hundred million, six hundred twenty-one thousand, forty-three".