663350437 has 4 divisors (see below), whose sum is σ = 686224620. Its totient is φ = 640476256.

The previous prime is 663350407. The next prime is 663350447. The reversal of 663350437 is 734053366.

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 464230116 + 199120321 = 21546^2 + 14111^2 .

It is a cyclic number.

It is not a de Polignac number, because 663350437 - 2⁷ = 663350309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663350396 and 663350405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663350407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11437048 + ... + 11437105.

It is an arithmetic number, because the mean of its divisors is an integer number (171556155).

Almost surely, 2^663350437 is an apocalyptic number.

It is an amenable number.

663350437 is a deficient number, since it is larger than the sum of its proper divisors (22874183).

663350437 is a wasteful number, since it uses less digits than its factorization.

663350437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22874182.

The product of its (nonzero) digits is 136080, while the sum is 37.

The square root of 663350437 is about 25755.5904028621. The cubic root of 663350437 is about 872.1295595762.

The spelling of 663350437 in words is "six hundred sixty-three million, three hundred fifty thousand, four hundred thirty-seven".