673840717566 has 16 divisors (see below), whose sum is σ = 1379022864384. Its totient is φ = 219390000984.

The previous prime is 673840717507. The next prime is 673840717591. The reversal of 673840717566 is 665717048376.

It is a super-2 number, since 2×673840717566² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1305892606 + ... + 1305893121.

It is an arithmetic number, because the mean of its divisors is an integer number (86188929024).

Almost surely, 2^673840717566 is an apocalyptic number.

673840717566 is an abundant number, since it is smaller than the sum of its proper divisors (705182146818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673840717566 is a wasteful number, since it uses less digits than its factorization.

673840717566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611785775.

The product of its (nonzero) digits is 35562240, while the sum is 60.

The spelling of 673840717566 in words is "six hundred seventy-three billion, eight hundred forty million, seven hundred seventeen thousand, five hundred sixty-six".