669469444671 has 16 divisors (see below), whose sum is σ = 894291805440. Its totient is φ = 445480196160.

The previous prime is 669469444661. The next prime is 669469444687. The reversal of 669469444671 is 176444964966.

It is not a de Polignac number, because 669469444671 - 2²² = 669465250367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669469444661) 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, 22966776 + ... + 22995906.

It is an arithmetic number, because the mean of its divisors is an integer number (55893237840).

Almost surely, 2^669469444671 is an apocalyptic number.

669469444671 is a deficient number, since it is larger than the sum of its proper divisors (224822360769).

669469444671 is a wasteful number, since it uses less digits than its factorization.

669469444671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43166.

The product of its digits is 188116992, while the sum is 66.

The spelling of 669469444671 in words is "six hundred sixty-nine billion, four hundred sixty-nine million, four hundred forty-four thousand, six hundred seventy-one".