667210580861 has 32 divisors (see below), whose sum is σ = 759788121600. Its totient is φ = 580353439680.

The previous prime is 667210580831. The next prime is 667210580863. The reversal of 667210580861 is 168085012766.

It is a cyclic number.

It is not a de Polignac number, because 667210580861 - 2⁶ = 667210580797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667210580863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18024470 + ... + 18061448.

It is an arithmetic number, because the mean of its divisors is an integer number (23743378800).

Almost surely, 2^667210580861 is an apocalyptic number.

It is an amenable number.

667210580861 is a deficient number, since it is larger than the sum of its proper divisors (92577540739).

667210580861 is a wasteful number, since it uses less digits than its factorization.

667210580861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37529.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 667210580861 in words is "six hundred sixty-seven billion, two hundred ten million, five hundred eighty thousand, eight hundred sixty-one".