120665550 has 48 divisors (see below), whose sum is σ = 299949552. Its totient is φ = 32102400.

The previous prime is 120665543. The next prime is 120665557. The reversal of 120665550 is 55566021.

It is an interprime number because it is at equal distance from previous prime (120665543) and next prime (120665557).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120665557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98542 + ... + 99758.

It is an arithmetic number, because the mean of its divisors is an integer number (6248949).

Almost surely, 2^120665550 is an apocalyptic number.

120665550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120665550 is an abundant number, since it is smaller than the sum of its proper divisors (179284002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120665550 is a wasteful number, since it uses less digits than its factorization.

120665550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 120665550 is about 10984.7872077706. The cubic root of 120665550 is about 494.1526161143.

The spelling of 120665550 in words is "one hundred twenty million, six hundred sixty-five thousand, five hundred fifty".