663278557065 has 8 divisors (see below), whose sum is σ = 1061245691328. Its totient is φ = 353748563760.

The previous prime is 663278557027. The next prime is 663278557069. The reversal of 663278557065 is 560755872366.

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

It is not a de Polignac number, because 663278557065 - 2⁶ = 663278557001 is a prime.

It is a super-2 number, since 2×663278557065² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 22109285221 + ... + 22109285250.

It is an arithmetic number, because the mean of its divisors is an integer number (132655711416).

Almost surely, 2^663278557065 is an apocalyptic number.

It is an amenable number.

663278557065 is a deficient number, since it is larger than the sum of its proper divisors (397967134263).

663278557065 is a wasteful number, since it uses less digits than its factorization.

663278557065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44218570479.

The product of its (nonzero) digits is 63504000, while the sum is 60.

The spelling of 663278557065 in words is "six hundred sixty-three billion, two hundred seventy-eight million, five hundred fifty-seven thousand, sixty-five".