665625463 has 16 divisors (see below), whose sum is σ = 720485280. Its totient is φ = 612591616.

The previous prime is 665625439. The next prime is 665625533. The reversal of 665625463 is 364526566.

It is a cyclic number.

It is not a de Polignac number, because 665625463 - 2⁵ = 665625431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665625403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311583 + ... + 313711.

It is an arithmetic number, because the mean of its divisors is an integer number (45030330).

Almost surely, 2^665625463 is an apocalyptic number.

665625463 is a deficient number, since it is larger than the sum of its proper divisors (54859817).

665625463 is a wasteful number, since it uses less digits than its factorization.

665625463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546.

The product of its digits is 777600, while the sum is 43.

The square root of 665625463 is about 25799.7182736556. The cubic root of 665625463 is about 873.1254401759.

The spelling of 665625463 in words is "six hundred sixty-five million, six hundred twenty-five thousand, four hundred sixty-three".