6661213058 has 8 divisors (see below), whose sum is σ = 10336365180. Its totient is φ = 3215758000.

The previous prime is 6661213043. The next prime is 6661213067. The reversal of 6661213058 is 8503121666.

It can be written as a sum of positive squares in 2 ways, for example, as 6596201089 + 65011969 = 81217^2 + 8063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×6661213058³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57424193 + ... + 57424308.

Almost surely, 2^6661213058 is an apocalyptic number.

6661213058 is a deficient number, since it is larger than the sum of its proper divisors (3675152122).

6661213058 is a wasteful number, since it uses less digits than its factorization.

6661213058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114848532.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 6661213058 is about 81616.2548638444. The cubic root of 6661213058 is about 1881.5587135334.

The spelling of 6661213058 in words is "six billion, six hundred sixty-one million, two hundred thirteen thousand, fifty-eight".