671065222561471 has 4 divisors (see below), whose sum is σ = 677709432685944. Its totient is φ = 664421012437000.

The previous prime is 671065222561441. The next prime is 671065222561493. The reversal of 671065222561471 is 174165222560176.

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

It is a cyclic number.

It is not a de Polignac number, because 671065222561471 - 2⁵ = 671065222561439 is a prime.

It is a super-3 number, since 3×671065222561471³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671065222561441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3322105062085 + ... + 3322105062286.

It is an arithmetic number, because the mean of its divisors is an integer number (169427358171486).

Almost surely, 2^{671065222561471} is an apocalyptic number.

671065222561471 is a deficient number, since it is larger than the sum of its proper divisors (6644210124473).

671065222561471 is a wasteful number, since it uses less digits than its factorization.

671065222561471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6644210124472.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 671065222561471 in words is "six hundred seventy-one trillion, sixty-five billion, two hundred twenty-two million, five hundred sixty-one thousand, four hundred seventy-one".