663260407 has 16 divisors (see below), whose sum is σ = 724267008. Its totient is φ = 605499840.

The previous prime is 663260401. The next prime is 663260441. The reversal of 663260407 is 704062366.

It is not a de Polignac number, because 663260407 - 2³ = 663260399 is a prime.

It is a super-3 number, since 3×663260407³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663260401) 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, 45678 + ... + 58420.

It is an arithmetic number, because the mean of its divisors is an integer number (45266688).

Almost surely, 2^663260407 is an apocalyptic number.

663260407 is a deficient number, since it is larger than the sum of its proper divisors (61006601).

663260407 is a wasteful number, since it uses less digits than its factorization.

663260407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12870.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 663260407 is about 25753.8425676636. The cubic root of 663260407 is about 872.0901026154.

The spelling of 663260407 in words is "six hundred sixty-three million, two hundred sixty thousand, four hundred seven".