120661633 has 4 divisors (see below), whose sum is σ = 120736980. Its totient is φ = 120586288.

The previous prime is 120661603. The next prime is 120661637. The reversal of 120661633 is 336166021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336166021 = 7547 ⋅44543.

It can be written as a sum of positive squares in 2 ways, for example, as 2982529 + 117679104 = 1727^2 + 10848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120661633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120661637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35218 + ... + 38491.

It is an arithmetic number, because the mean of its divisors is an integer number (30184245).

Almost surely, 2^120661633 is an apocalyptic number.

It is an amenable number.

120661633 is a deficient number, since it is larger than the sum of its proper divisors (75347).

120661633 is an equidigital number, since it uses as much as digits as its factorization.

120661633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75346.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 120661633 is about 10984.6089142946. The cubic root of 120661633 is about 494.1472690572.

The spelling of 120661633 in words is "one hundred twenty million, six hundred sixty-one thousand, six hundred thirty-three".