660121441 has 32 divisors (see below), whose sum is σ = 818657280. Its totient is φ = 519449856.

The previous prime is 660121421. The next prime is 660121457. The reversal of 660121441 is 144121066.

660121441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 660121441 - 2¹³ = 660113249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660121421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1172226 + ... + 1172788.

It is an arithmetic number, because the mean of its divisors is an integer number (25583040).

Almost surely, 2^660121441 is an apocalyptic number.

It is an amenable number.

660121441 is a deficient number, since it is larger than the sum of its proper divisors (158535839).

660121441 is a wasteful number, since it uses less digits than its factorization.

660121441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 660121441 is about 25692.8285908734. The cubic root of 660121441 is about 870.7121666866.

The spelling of 660121441 in words is "six hundred sixty million, one hundred twenty-one thousand, four hundred forty-one".