672691864465 has 8 divisors (see below), whose sum is σ = 809203907880. Its totient is φ = 536837711232.

The previous prime is 672691864459. The next prime is 672691864469. The reversal of 672691864465 is 564468196276.

It can be written as a sum of positive squares in 4 ways, for example, as 180707459409 + 491984405056 = 425097^2 + 701416^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 672691864465 - 2⁵ = 672691864433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672691864397 and 672691864406.

It is not an unprimeable number, because it can be changed into a prime (672691864469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164470294 + ... + 164474383.

It is an arithmetic number, because the mean of its divisors is an integer number (101150488485).

Almost surely, 2^672691864465 is an apocalyptic number.

It is an amenable number.

672691864465 is a deficient number, since it is larger than the sum of its proper divisors (136512043415).

672691864465 is a wasteful number, since it uses less digits than its factorization.

672691864465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328945091.

The product of its digits is 104509440, while the sum is 64.

The spelling of 672691864465 in words is "six hundred seventy-two billion, six hundred ninety-one million, eight hundred sixty-four thousand, four hundred sixty-five".