663367785457 has 16 divisors (see below), whose sum is σ = 717888302208. Its totient is φ = 609352007040.

The previous prime is 663367785427. The next prime is 663367785461. The reversal of 663367785457 is 754587763366.

It is a cyclic number.

It is not a de Polignac number, because 663367785457 - 2¹⁵ = 663367752689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663367785392 and 663367785401.

It is not an unprimeable number, because it can be changed into a prime (663367785427) 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 15 ways as a sum of consecutive naturals, for example, 2612157 + ... + 2854837.

It is an arithmetic number, because the mean of its divisors is an integer number (44868018888).

Almost surely, 2^663367785457 is an apocalyptic number.

It is an amenable number.

663367785457 is a deficient number, since it is larger than the sum of its proper divisors (54520516751).

663367785457 is a wasteful number, since it uses less digits than its factorization.

663367785457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243720.

The product of its digits is 533433600, while the sum is 67.

The spelling of 663367785457 in words is "six hundred sixty-three billion, three hundred sixty-seven million, seven hundred eighty-five thousand, four hundred fifty-seven".