120665775 has 24 divisors (see below), whose sum is σ = 199907344. Its totient is φ = 64224000.

The previous prime is 120665773. The next prime is 120665801. The reversal of 120665775 is 577566021.

It is not a de Polignac number, because 120665775 - 2¹ = 120665773 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 (120665771) 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, 43737 + ... + 46413.

Almost surely, 2^120665775 is an apocalyptic number.

120665775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120665775 is a deficient number, since it is larger than the sum of its proper divisors (79241569).

120665775 is a wasteful number, since it uses less digits than its factorization.

120665775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3291 (or 3286 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 120665775 is about 10984.7974492022. The cubic root of 120665775 is about 494.1529232560.

The spelling of 120665775 in words is "one hundred twenty million, six hundred sixty-five thousand, seven hundred seventy-five".