2660989459 has 4 divisors (see below), whose sum is σ = 2717606304. Its totient is φ = 2604372616.

The previous prime is 2660989417. The next prime is 2660989489. The reversal of 2660989459 is 9549890662.

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

It is a cyclic number.

It is not a de Polignac number, because 2660989459 - 2²¹ = 2658892307 is a prime.

It is a super-2 number, since 2×2660989459² = 14161729801818225362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2660989489) 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, 28308352 + ... + 28308445.

It is an arithmetic number, because the mean of its divisors is an integer number (679401576).

Almost surely, 2^2660989459 is an apocalyptic number.

2660989459 is a deficient number, since it is larger than the sum of its proper divisors (56616845).

2660989459 is an equidigital number, since it uses as much as digits as its factorization.

2660989459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56616844.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The square root of 2660989459 is about 51584.7793346061. The cubic root of 2660989459 is about 1385.7377605288.

The spelling of 2660989459 in words is "two billion, six hundred sixty million, nine hundred eighty-nine thousand, four hundred fifty-nine".