663670336940 has 24 divisors (see below), whose sum is σ = 1500915993360. Its totient is φ = 245047508928.

The previous prime is 663670336919. The next prime is 663670336951. The reversal of 663670336940 is 49633076366.

It is a super-2 number, since 2×663670336940² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276288850 + ... + 1276289369.

It is an arithmetic number, because the mean of its divisors is an integer number (62538166390).

Almost surely, 2^663670336940 is an apocalyptic number.

It is an amenable number.

663670336940 is an abundant number, since it is smaller than the sum of its proper divisors (837245656420).

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

663670336940 is a wasteful number, since it uses less digits than its factorization.

663670336940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552578241 (or 2552578239 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 53.

The spelling of 663670336940 in words is "six hundred sixty-three billion, six hundred seventy million, three hundred thirty-six thousand, nine hundred forty".