671745366 has 24 divisors (see below), whose sum is σ = 1493190840. Its totient is φ = 223851636.

The previous prime is 671745341. The next prime is 671745367. The reversal of 671745366 is 663547176.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671745367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188695 + ... + 192221.

It is an arithmetic number, because the mean of its divisors is an integer number (62216285).

Almost surely, 2^671745366 is an apocalyptic number.

671745366 is an abundant number, since it is smaller than the sum of its proper divisors (821445474).

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

671745366 is an frugal number, since it uses more digits than its factorization.

671745366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7065 (or 3532 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 671745366 is about 25918.0509683888. The cubic root of 671745366 is about 875.7931816125.

The spelling of 671745366 in words is "six hundred seventy-one million, seven hundred forty-five thousand, three hundred sixty-six".