663034672538 has 16 divisors (see below), whose sum is σ = 1136669720640. Its totient is φ = 284148003456.

The previous prime is 663034672507. The next prime is 663034672541. The reversal of 663034672538 is 835276430366.

It is a happy number.

It is a super-2 number, since 2×663034672538² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 663034672538.

It is an unprimeable number.

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, 377303 + ... + 1211786.

It is an arithmetic number, because the mean of its divisors is an integer number (71041857540).

Almost surely, 2^663034672538 is an apocalyptic number.

663034672538 is a deficient number, since it is larger than the sum of its proper divisors (473635048102).

663034672538 is a wasteful number, since it uses less digits than its factorization.

663034672538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618901.

The product of its (nonzero) digits is 13063680, while the sum is 53.

The spelling of 663034672538 in words is "six hundred sixty-three billion, thirty-four million, six hundred seventy-two thousand, five hundred thirty-eight".