663655414 has 4 divisors (see below), whose sum is σ = 995483124. Its totient is φ = 331827706.

The previous prime is 663655393. The next prime is 663655451. The reversal of 663655414 is 414556366.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×663655414² = 880877017063022792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165913852 + ... + 165913855.

It is an arithmetic number, because the mean of its divisors is an integer number (248870781).

Almost surely, 2^663655414 is an apocalyptic number.

663655414 is a deficient number, since it is larger than the sum of its proper divisors (331827710).

663655414 is a wasteful number, since it uses less digits than its factorization.

663655414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331827709.

The product of its digits is 259200, while the sum is 40.

The square root of 663655414 is about 25761.5103206314. The cubic root of 663655414 is about 872.2631936710.

The spelling of 663655414 in words is "six hundred sixty-three million, six hundred fifty-five thousand, four hundred fourteen".