663416555 has 8 divisors (see below), whose sum is σ = 797033952. Its totient is φ = 530110528.

The previous prime is 663416519. The next prime is 663416561. The reversal of 663416555 is 555614366.

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 663416555 - 2¹² = 663412459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73127 + ... + 81696.

It is an arithmetic number, because the mean of its divisors is an integer number (99629244).

Almost surely, 2^663416555 is an apocalyptic number.

663416555 is a deficient number, since it is larger than the sum of its proper divisors (133617397).

663416555 is a wasteful number, since it uses less digits than its factorization.

663416555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155685.

The product of its digits is 324000, while the sum is 41.

The square root of 663416555 is about 25756.8739368736. The cubic root of 663416555 is about 872.1585344807.

The spelling of 663416555 in words is "six hundred sixty-three million, four hundred sixteen thousand, five hundred fifty-five".