663278557066 has 8 divisors (see below), whose sum is σ = 1027011959424. Its totient is φ = 320941237260.

The previous prime is 663278557027. The next prime is 663278557069. The reversal of 663278557066 is 660755872366.

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

It is a junction number, because it is equal to n+sod(n) for n = 663278556995 and 663278557013.

It is not an unprimeable number, because it can be changed into a prime (663278557069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5349020560 + ... + 5349020683.

It is an arithmetic number, because the mean of its divisors is an integer number (128376494928).

Almost surely, 2^663278557066 is an apocalyptic number.

663278557066 is a deficient number, since it is larger than the sum of its proper divisors (363733402358).

663278557066 is a wasteful number, since it uses less digits than its factorization.

663278557066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698041276.

The product of its (nonzero) digits is 76204800, while the sum is 61.

The spelling of 663278557066 in words is "six hundred sixty-three billion, two hundred seventy-eight million, five hundred fifty-seven thousand, sixty-six".