672404465 has 4 divisors (see below), whose sum is σ = 806885364. Its totient is φ = 537923568.

The previous prime is 672404443. The next prime is 672404501. The reversal of 672404465 is 564404276.

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 494795536 + 177608929 = 22244^2 + 13327^2 .

It is a cyclic number.

It is not a de Polignac number, because 672404465 - 2¹⁸ = 672142321 is a prime.

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, 67240442 + ... + 67240451.

It is an arithmetic number, because the mean of its divisors is an integer number (201721341).

Almost surely, 2^672404465 is an apocalyptic number.

It is an amenable number.

672404465 is a deficient number, since it is larger than the sum of its proper divisors (134480899).

672404465 is a wasteful number, since it uses less digits than its factorization.

672404465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134480898.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 672404465 is about 25930.7629081753. The cubic root of 672404465 is about 876.0795231109.

The spelling of 672404465 in words is "six hundred seventy-two million, four hundred four thousand, four hundred sixty-five".