672111620 has 24 divisors (see below), whose sum is σ = 1456965888. Its totient is φ = 260172000.

The previous prime is 672111617. The next prime is 672111653. The reversal of 672111620 is 26111276.

It is a self number, because there is not a number n which added to its sum of digits gives 672111620.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541406 + ... + 542645.

It is an arithmetic number, because the mean of its divisors is an integer number (60706912).

Almost surely, 2^672111620 is an apocalyptic number.

It is an amenable number.

672111620 is an abundant number, since it is smaller than the sum of its proper divisors (784854268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672111620 is a wasteful number, since it uses less digits than its factorization.

672111620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084091 (or 1084089 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 672111620 is about 25925.1156217287. The cubic root of 672111620 is about 875.9523215156.

Adding to 672111620 its reverse (26111276), we get a palindrome (698222896).

The spelling of 672111620 in words is "six hundred seventy-two million, one hundred eleven thousand, six hundred twenty".