672320071 has 4 divisors (see below), whose sum is σ = 672374200. Its totient is φ = 672265944.

The previous prime is 672320059. The next prime is 672320083. The reversal of 672320071 is 170023276.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (672320059) and next prime (672320083).

It is a cyclic number.

It is not a de Polignac number, because 672320071 - 2⁷ = 672319943 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 (672320171) 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, 1900 + ... + 36718.

It is an arithmetic number, because the mean of its divisors is an integer number (168093550).

Almost surely, 2^672320071 is an apocalyptic number.

672320071 is a deficient number, since it is larger than the sum of its proper divisors (54129).

672320071 is a wasteful number, since it uses less digits than its factorization.

672320071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54128.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 672320071 is about 25929.1355621432. The cubic root of 672320071 is about 876.0428691064.

The spelling of 672320071 in words is "six hundred seventy-two million, three hundred twenty thousand, seventy-one".