663451337 has 4 divisors (see below), whose sum is σ = 667116996. Its totient is φ = 659785680.

The previous prime is 663451331. The next prime is 663451361. The reversal of 663451337 is 733154366.

It is a happy number.

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 226683136 + 436768201 = 15056^2 + 20899^2 .

It is a cyclic number.

It is not a de Polignac number, because 663451337 - 2⁸ = 663451081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663451337.

It is not an unprimeable number, because it can be changed into a prime (663451331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832558 + ... + 1832919.

It is an arithmetic number, because the mean of its divisors is an integer number (166779249).

Almost surely, 2^663451337 is an apocalyptic number.

It is an amenable number.

663451337 is a deficient number, since it is larger than the sum of its proper divisors (3665659).

663451337 is a wasteful number, since it uses less digits than its factorization.

663451337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665658.

The product of its digits is 136080, while the sum is 38.

The square root of 663451337 is about 25757.5491264212. The cubic root of 663451337 is about 872.1737762307.

The spelling of 663451337 in words is "six hundred sixty-three million, four hundred fifty-one thousand, three hundred thirty-seven".