671721702 has 48 divisors (see below), whose sum is σ = 1403657136. Its totient is φ = 214272000.

The previous prime is 671721683. The next prime is 671721709. The reversal of 671721702 is 207127176.

It is a happy number.

It is a Smith number, since the sum of its digits (33) 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 (671721709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 558702 + ... + 559902.

It is an arithmetic number, because the mean of its divisors is an integer number (29242857).

Almost surely, 2^671721702 is an apocalyptic number.

671721702 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

671721702 is an abundant number, since it is smaller than the sum of its proper divisors (731935434).

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

671721702 is a wasteful number, since it uses less digits than its factorization.

671721702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 671721702 is about 25917.5944485595. The cubic root of 671721702 is about 875.7828974511.

Adding to 671721702 its reverse (207127176), we get a palindrome (878848878).

The spelling of 671721702 in words is "six hundred seventy-one million, seven hundred twenty-one thousand, seven hundred two".