663879383426 has 16 divisors (see below), whose sum is σ = 1138112990784. Its totient is φ = 284511223824.

The previous prime is 663879383423. The next prime is 663879383471. The reversal of 663879383426 is 624383978366.

It is not an unprimeable number, because it can be changed into a prime (663879383423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212660 + ... + 1171743.

It is an arithmetic number, because the mean of its divisors is an integer number (71132061924).

Almost surely, 2^663879383426 is an apocalyptic number.

663879383426 is a deficient number, since it is larger than the sum of its proper divisors (474233607358).

663879383426 is a wasteful number, since it uses less digits than its factorization.

663879383426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418665.

The product of its digits is 188116992, while the sum is 65.

The spelling of 663879383426 in words is "six hundred sixty-three billion, eight hundred seventy-nine million, three hundred eighty-three thousand, four hundred twenty-six".