120661657 has 8 divisors (see below), whose sum is σ = 126020160. Its totient is φ = 115312560.

The previous prime is 120661649. The next prime is 120661669. The reversal of 120661657 is 756166021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 120661657 - 2³ = 120661649 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41394 + ... + 44212.

It is an arithmetic number, because the mean of its divisors is an integer number (15752520).

Almost surely, 2^120661657 is an apocalyptic number.

It is an amenable number.

120661657 is a deficient number, since it is larger than the sum of its proper divisors (5358503).

120661657 is a wasteful number, since it uses less digits than its factorization.

120661657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 120661657 is about 10984.6100067321. The cubic root of 120661657 is about 494.1473018197.

The spelling of 120661657 in words is "one hundred twenty million, six hundred sixty-one thousand, six hundred fifty-seven".