672838260865 has 4 divisors (see below), whose sum is σ = 807405913044. Its totient is φ = 538270608688.

The previous prime is 672838260847. The next prime is 672838260877. The reversal of 672838260865 is 568062838276.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136078356544 + 536759904321 = 368888^2 + 732639^2 .

It is a cyclic number.

It is not a de Polignac number, because 672838260865 - 2³¹ = 670690777217 is a prime.

It is a super-3 number, since 3×672838260865³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67283826082 + ... + 67283826091.

It is an arithmetic number, because the mean of its divisors is an integer number (201851478261).

Almost surely, 2^672838260865 is an apocalyptic number.

It is an amenable number.

672838260865 is a deficient number, since it is larger than the sum of its proper divisors (134567652179).

672838260865 is a wasteful number, since it uses less digits than its factorization.

672838260865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134567652178.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 672838260865 in words is "six hundred seventy-two billion, eight hundred thirty-eight million, two hundred sixty thousand, eight hundred sixty-five".