6661614514 has 16 divisors (see below), whose sum is σ = 10047053016. Its totient is φ = 3312633600.

The previous prime is 6661614511. The next prime is 6661614517. The reversal of 6661614514 is 4154161666.

It is an interprime number because it is at equal distance from previous prime (6661614511) and next prime (6661614517).

It can be written as a sum of positive squares in 4 ways, for example, as 6653175489 + 8439025 = 81567^2 + 2905^2 .

It is not an unprimeable number, because it can be changed into a prime (6661614511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375484 + ... + 392824.

Almost surely, 2^6661614514 is an apocalyptic number.

6661614514 is a deficient number, since it is larger than the sum of its proper divisors (3385438502).

6661614514 is a wasteful number, since it uses less digits than its factorization.

6661614514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18381.

The product of its digits is 103680, while the sum is 40.

The square root of 6661614514 is about 81618.7142388313. The cubic root of 6661614514 is about 1881.5965118470.

The spelling of 6661614514 in words is "six billion, six hundred sixty-one million, six hundred fourteen thousand, five hundred fourteen".