660212411 has 4 divisors (see below), whose sum is σ = 675566232. Its totient is φ = 644858592.

The previous prime is 660212393. The next prime is 660212417. The reversal of 660212411 is 114212066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660212411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660212417) 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, 7676846 + ... + 7676931.

It is an arithmetic number, because the mean of its divisors is an integer number (168891558).

Almost surely, 2^660212411 is an apocalyptic number.

660212411 is a deficient number, since it is larger than the sum of its proper divisors (15353821).

660212411 is a wasteful number, since it uses less digits than its factorization.

660212411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15353820.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 660212411 is about 25694.5988682447. The cubic root of 660212411 is about 870.7521618767.

Adding to 660212411 its reverse (114212066), we get a palindrome (774424477).

The spelling of 660212411 in words is "six hundred sixty million, two hundred twelve thousand, four hundred eleven".