667211070591 has 80 divisors (see below), whose sum is σ = 1108544709888. Its totient is φ = 397148313600.

The previous prime is 667211070557. The next prime is 667211070593. The reversal of 667211070591 is 195070112766.

It is not a de Polignac number, because 667211070591 - 2³³ = 658621135999 is a prime.

It is a super-2 number, since 2×667211070591² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667211070593) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 89470735 + ... + 89478191.

Almost surely, 2^667211070591 is an apocalyptic number.

667211070591 is a deficient number, since it is larger than the sum of its proper divisors (441333639297).

667211070591 is a wasteful number, since it uses less digits than its factorization.

667211070591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254 (or 10245 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 667211070591 in words is "six hundred sixty-seven billion, two hundred eleven million, seventy thousand, five hundred ninety-one".