671724867 has 32 divisors (see below), whose sum is σ = 1027031040. Its totient is φ = 386543520.

The previous prime is 671724839. The next prime is 671724877. The reversal of 671724867 is 768427176.

It is a de Polignac number, because none of the positive numbers 2^k-671724867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671724827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102318 + ... + 108684.

It is an arithmetic number, because the mean of its divisors is an integer number (32094720).

Almost surely, 2^671724867 is an apocalyptic number.

671724867 is a deficient number, since it is larger than the sum of its proper divisors (355306173).

671724867 is a wasteful number, since it uses less digits than its factorization.

671724867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543.

The product of its digits is 790272, while the sum is 48.

The square root of 671724867 is about 25917.6555073950. The cubic root of 671724867 is about 875.7842729456.

The spelling of 671724867 in words is "six hundred seventy-one million, seven hundred twenty-four thousand, eight hundred sixty-seven".