663146738457 has 16 divisors (see below), whose sum is σ = 1010566880640. Its totient is φ = 378919406592.

The previous prime is 663146738437. The next prime is 663146738479. The reversal of 663146738457 is 754837641366.

It is not a de Polignac number, because 663146738457 - 2⁷ = 663146738329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663146738457.

It is not an unprimeable number, because it can be changed into a prime (663146738437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518278 + ... + 1262895.

It is an arithmetic number, because the mean of its divisors is an integer number (63160430040).

Almost surely, 2^663146738457 is an apocalyptic number.

It is an amenable number.

663146738457 is a deficient number, since it is larger than the sum of its proper divisors (347420142183).

663146738457 is a wasteful number, since it uses less digits than its factorization.

663146738457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798912.

The product of its digits is 60963840, while the sum is 60.

The spelling of 663146738457 in words is "six hundred sixty-three billion, one hundred forty-six million, seven hundred thirty-eight thousand, four hundred fifty-seven".