66600621042 has 8 divisors (see below), whose sum is σ = 133201242096. Its totient is φ = 22200207012.

The previous prime is 66600621029. The next prime is 66600621049. The reversal of 66600621042 is 24012600666.

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

66600621042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 66600620994 and 66600621012.

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 3 ways as a sum of consecutive naturals, for example, 5550051748 + ... + 5550051759.

It is an arithmetic number, because the mean of its divisors is an integer number (16650155262).

Almost surely, 2^66600621042 is an apocalyptic number.

66600621042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66600621042 is a wasteful number, since it uses less digits than its factorization.

66600621042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11100103512.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 66600621042 in words is "sixty-six billion, six hundred million, six hundred twenty-one thousand, forty-two".