666801400134 has 16 divisors (see below), whose sum is σ = 1355465142000. Its totient is φ = 218623409760.

The previous prime is 666801400087. The next prime is 666801400229. The reversal of 666801400134 is 431004108666.

It is a junction number, because it is equal to n+sod(n) for n = 666801400092 and 666801400101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910930509 + ... + 910931240.

It is an arithmetic number, because the mean of its divisors is an integer number (84716571375).

Almost surely, 2^666801400134 is an apocalyptic number.

666801400134 is an abundant number, since it is smaller than the sum of its proper divisors (688663741866).

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

666801400134 is a wasteful number, since it uses less digits than its factorization.

666801400134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821861815.

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 666801400134 in words is "six hundred sixty-six billion, eight hundred one million, four hundred thousand, one hundred thirty-four".