671206156236722 has 4 divisors (see below), whose sum is σ = 1006809234355086. Its totient is φ = 335603078118360.

The previous prime is 671206156236713. The next prime is 671206156236769. The reversal of 671206156236722 is 227632651602176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 575422176985681 + 95783979251041 = 23987959^2 + 9786929^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167801539059179 + ... + 167801539059182.

Almost surely, 2^{671206156236722} is an apocalyptic number.

671206156236722 is a deficient number, since it is larger than the sum of its proper divisors (335603078118364).

671206156236722 is a wasteful number, since it uses less digits than its factorization.

671206156236722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335603078118363.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 671206156236722 in words is "six hundred seventy-one trillion, two hundred six billion, one hundred fifty-six million, two hundred thirty-six thousand, seven hundred twenty-two".