671622071 has 4 divisors (see below), whose sum is σ = 672296712. Its totient is φ = 670947432.

The previous prime is 671622067. The next prime is 671622079. The reversal of 671622071 is 170226176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671622071 - 2² = 671622067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671622079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335825 + ... + 337818.

It is an arithmetic number, because the mean of its divisors is an integer number (168074178).

Almost surely, 2^671622071 is an apocalyptic number.

671622071 is a deficient number, since it is larger than the sum of its proper divisors (674641).

671622071 is an equidigital number, since it uses as much as digits as its factorization.

671622071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674640.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 671622071 is about 25915.6723046114. The cubic root of 671622071 is about 875.7395960661.

The spelling of 671622071 in words is "six hundred seventy-one million, six hundred twenty-two thousand, seventy-one".