663854654934 has 32 divisors (see below), whose sum is σ = 1490441161440. Its totient is φ = 219003595776.

The previous prime is 663854654899. The next prime is 663854654951. The reversal of 663854654934 is 439456458366.

663854654934 is a `hidden beast` number, since 6 + 6 + 3 + 8 + 54 + 6 + 549 + 34 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63363859 + ... + 63374334.

It is an arithmetic number, because the mean of its divisors is an integer number (46576286295).

Almost surely, 2^663854654934 is an apocalyptic number.

663854654934 is an abundant number, since it is smaller than the sum of its proper divisors (826586506506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663854654934 is a wasteful number, since it uses less digits than its factorization.

663854654934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126738301 (or 126738295 counting only the distinct ones).

The product of its digits is 223948800, while the sum is 63.

The spelling of 663854654934 in words is "six hundred sixty-three billion, eight hundred fifty-four million, six hundred fifty-four thousand, nine hundred thirty-four".