721674067 has 4 divisors (see below), whose sum is σ = 728295040. Its totient is φ = 715053096.

The previous prime is 721674053. The next prime is 721674073. The reversal of 721674067 is 760476127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 760476127 = 127 ⋅5988001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721674067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721674167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3310323 + ... + 3310540.

It is an arithmetic number, because the mean of its divisors is an integer number (182073760).

Almost surely, 2^721674067 is an apocalyptic number.

721674067 is a deficient number, since it is larger than the sum of its proper divisors (6620973).

721674067 is a wasteful number, since it uses less digits than its factorization.

721674067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620972.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 721674067 is about 26863.9920153353. The cubic root of 721674067 is about 896.9750571710.

The spelling of 721674067 in words is "seven hundred twenty-one million, six hundred seventy-four thousand, sixty-seven".