671077147221 has 12 divisors (see below), whose sum is σ = 1043897784748. Its totient is φ = 412970552064.

The previous prime is 671077147217. The next prime is 671077147277. The reversal of 671077147221 is 122741770176.

671077147221 is a `hidden beast` number, since 6 + 7 + 107 + 71 + 472 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 198229752900 + 472847394321 = 445230^2 + 687639^2 .

It is not a de Polignac number, because 671077147221 - 2² = 671077147217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671077147201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2867850940 + ... + 2867851173.

Almost surely, 2^671077147221 is an apocalyptic number.

It is an amenable number.

671077147221 is a deficient number, since it is larger than the sum of its proper divisors (372820637527).

671077147221 is a wasteful number, since it uses less digits than its factorization.

671077147221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735702132 (or 5735702129 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 45.

The spelling of 671077147221 in words is "six hundred seventy-one billion, seventy-seven million, one hundred forty-seven thousand, two hundred twenty-one".