667406022775121 has 16 divisors (see below), whose sum is σ = 791435296832640. Its totient is φ = 550667329914240.

The previous prime is 667406022775087. The next prime is 667406022775133. The reversal of 667406022775121 is 121577220604766.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-667406022775121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667406022775021) 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, 4966268756 + ... + 4966403141.

It is an arithmetic number, because the mean of its divisors is an integer number (49464706052040).

Almost surely, 2^{667406022775121} is an apocalyptic number.

It is an amenable number.

667406022775121 is a deficient number, since it is larger than the sum of its proper divisors (124029274057519).

667406022775121 is a wasteful number, since it uses less digits than its factorization.

667406022775121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932672264.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 667406022775121 in words is "six hundred sixty-seven trillion, four hundred six billion, twenty-two million, seven hundred seventy-five thousand, one hundred twenty-one".