120655663 has 4 divisors (see below), whose sum is σ = 121378320. Its totient is φ = 119933008.

The previous prime is 120655603. The next prime is 120655679. The reversal of 120655663 is 366556021.

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

It is a cyclic number.

It is not a de Polignac number, because 120655663 - 2⁹ = 120655151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120655603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361078 + ... + 361411.

It is an arithmetic number, because the mean of its divisors is an integer number (30344580).

Almost surely, 2^120655663 is an apocalyptic number.

120655663 is a deficient number, since it is larger than the sum of its proper divisors (722657).

120655663 is an equidigital number, since it uses as much as digits as its factorization.

120655663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722656.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 120655663 is about 10984.3371670757. The cubic root of 120655663 is about 494.1391192480.

The spelling of 120655663 in words is "one hundred twenty million, six hundred fifty-five thousand, six hundred sixty-three".