672665616587 has 4 divisors (see below), whose sum is σ = 673097090640. Its totient is φ = 672234142536.

The previous prime is 672665616547. The next prime is 672665616589. The reversal of 672665616587 is 785616566276.

It is a happy number.

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 672665616587 - 2¹⁴ = 672665600203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672665616589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215734688 + ... + 215737805.

It is an arithmetic number, because the mean of its divisors is an integer number (168274272660).

Almost surely, 2^672665616587 is an apocalyptic number.

672665616587 is a deficient number, since it is larger than the sum of its proper divisors (431474053).

672665616587 is a wasteful number, since it uses less digits than its factorization.

672665616587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431474052.

The product of its digits is 152409600, while the sum is 65.

The spelling of 672665616587 in words is "six hundred seventy-two billion, six hundred sixty-five million, six hundred sixteen thousand, five hundred eighty-seven".