666326621830 has 8 divisors (see below), whose sum is σ = 1199387919312. Its totient is φ = 266530648728.

The previous prime is 666326621813. The next prime is 666326621837. The reversal of 666326621830 is 38126623666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666326621837) 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, 33316331082 + ... + 33316331101.

It is an arithmetic number, because the mean of its divisors is an integer number (149923489914).

Almost surely, 2^666326621830 is an apocalyptic number.

666326621830 is a deficient number, since it is larger than the sum of its proper divisors (533061297482).

666326621830 is a wasteful number, since it uses less digits than its factorization.

666326621830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66632662190.

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 666326621830 in words is "six hundred sixty-six billion, three hundred twenty-six million, six hundred twenty-one thousand, eight hundred thirty".