663058921 has 8 divisors (see below), whose sum is σ = 759495744. Its totient is φ = 567050640.

The previous prime is 663058909. The next prime is 663058931. The reversal of 663058921 is 129850366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663058921 - 2⁷ = 663058793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663058931) 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 7 ways as a sum of consecutive naturals, for example, 103810 + ... + 110011.

It is an arithmetic number, because the mean of its divisors is an integer number (94936968).

Almost surely, 2^663058921 is an apocalyptic number.

It is an amenable number.

663058921 is a deficient number, since it is larger than the sum of its proper divisors (96436823).

663058921 is a wasteful number, since it uses less digits than its factorization.

663058921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214271.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 663058921 is about 25749.9305047606. The cubic root of 663058921 is about 872.0017854977.

The spelling of 663058921 in words is "six hundred sixty-three million, fifty-eight thousand, nine hundred twenty-one".