667502363664561 has 16 divisors (see below), whose sum is σ = 897035658854400. Its totient is φ = 441485514379728.

The previous prime is 667502363664481. The next prime is 667502363664569. The reversal of 667502363664561 is 165466363205766.

It is not a de Polignac number, because 667502363664561 - 2¹¹ = 667502363662513 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667502363664492 and 667502363664501.

It is not an unprimeable number, because it can be changed into a prime (667502363664569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10114971 + ... + 37911968.

It is an arithmetic number, because the mean of its divisors is an integer number (56064728678400).

Almost surely, 2^{667502363664561} is an apocalyptic number.

It is an amenable number.

667502363664561 is a deficient number, since it is larger than the sum of its proper divisors (229533295189839).

667502363664561 is a wasteful number, since it uses less digits than its factorization.

667502363664561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48063548.

The product of its (nonzero) digits is 587865600, while the sum is 66.

The spelling of 667502363664561 in words is "six hundred sixty-seven trillion, five hundred two billion, three hundred sixty-three million, six hundred sixty-four thousand, five hundred sixty-one".