671705306 has 8 divisors (see below), whose sum is σ = 1016801940. Its totient is φ = 332771328.

The previous prime is 671705297. The next prime is 671705357. The reversal of 671705306 is 603507176.

It can be written as a sum of positive squares in 2 ways, for example, as 671276281 + 429025 = 25909^2 + 655^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540391 + ... + 1540826.

Almost surely, 2^671705306 is an apocalyptic number.

671705306 is a deficient number, since it is larger than the sum of its proper divisors (345096634).

671705306 is a wasteful number, since it uses less digits than its factorization.

671705306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081328.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 671705306 is about 25917.2781364093. The cubic root of 671705306 is about 875.7757717555.

The spelling of 671705306 in words is "six hundred seventy-one million, seven hundred five thousand, three hundred six".