663670333694 has 8 divisors (see below), whose sum is σ = 1005170602800. Its totient is φ = 328613466096.

The previous prime is 663670333687. The next prime is 663670333727. The reversal of 663670333694 is 496333076366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610850119 + ... + 1610850530.

It is an arithmetic number, because the mean of its divisors is an integer number (125646325350).

Almost surely, 2^663670333694 is an apocalyptic number.

663670333694 is a deficient number, since it is larger than the sum of its proper divisors (341500269106).

663670333694 is a wasteful number, since it uses less digits than its factorization.

663670333694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221700754.

The product of its (nonzero) digits is 26453952, while the sum is 56.

The spelling of 663670333694 in words is "six hundred sixty-three billion, six hundred seventy million, three hundred thirty-three thousand, six hundred ninety-four".