660760121 has 4 divisors (see below), whose sum is σ = 755154432. Its totient is φ = 566365812.

The previous prime is 660760117. The next prime is 660760127. The reversal of 660760121 is 121067066.

660760121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660760121 - 2² = 660760117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660760127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47197145 + ... + 47197158.

It is an arithmetic number, because the mean of its divisors is an integer number (188788608).

Almost surely, 2^660760121 is an apocalyptic number.

It is an amenable number.

660760121 is a deficient number, since it is larger than the sum of its proper divisors (94394311).

660760121 is an equidigital number, since it uses as much as digits as its factorization.

660760121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94394310.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 660760121 is about 25705.2547351704. The cubic root of 660760121 is about 870.9928863445.

The spelling of 660760121 in words is "six hundred sixty million, seven hundred sixty thousand, one hundred twenty-one".