553660399 has 8 divisors (see below), whose sum is σ = 585350000. Its totient is φ = 522225792.

The previous prime is 553660391. The next prime is 553660411. The reversal of 553660399 is 993066355.

It is a happy number.

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

It is not a de Polignac number, because 553660399 - 2³ = 553660391 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 (553660391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59274 + ... + 67975.

It is an arithmetic number, because the mean of its divisors is an integer number (73168750).

Almost surely, 2^553660399 is an apocalyptic number.

553660399 is a deficient number, since it is larger than the sum of its proper divisors (31689601).

553660399 is a wasteful number, since it uses less digits than its factorization.

553660399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127497.

The product of its (nonzero) digits is 656100, while the sum is 46.

The square root of 553660399 is about 23529.9893540137. The cubic root of 553660399 is about 821.1348549054.

The spelling of 553660399 in words is "five hundred fifty-three million, six hundred sixty thousand, three hundred ninety-nine".