666261662030046 has 48 divisors (see below), whose sum is σ = 1484051616481200. Its totient is φ = 215870705697024.

The previous prime is 666261662029993. The next prime is 666261662030047. The reversal of 666261662030046 is 640030266162666.

It is a junction number, because it is equal to n+sod(n) for n = 666261662029974 and 666261662030001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666261662030047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495062836 + ... + 496406823.

It is an arithmetic number, because the mean of its divisors is an integer number (30917742010025).

Almost surely, 2^{666261662030046} is an apocalyptic number.

666261662030046 is an abundant number, since it is smaller than the sum of its proper divisors (817789954451154).

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

666261662030046 is a wasteful number, since it uses less digits than its factorization.

666261662030046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991470713 (or 991470710 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 54.

The spelling of 666261662030046 in words is "six hundred sixty-six trillion, two hundred sixty-one billion, six hundred sixty-two million, thirty thousand, forty-six".