6651779258 has 8 divisors (see below), whose sum is σ = 9978543252. Its totient is φ = 3325598176.

The previous prime is 6651779249. The next prime is 6651779291. The reversal of 6651779258 is 8529771566.

It can be written as a sum of positive squares in 2 ways, for example, as 6361179049 + 290600209 = 79757^2 + 17047^2 .

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

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, 115985 + ... + 163572.

Almost surely, 2^6651779258 is an apocalyptic number.

6651779258 is a deficient number, since it is larger than the sum of its proper divisors (3326763994).

6651779258 is a wasteful number, since it uses less digits than its factorization.

6651779258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291456.

The product of its digits is 6350400, while the sum is 56.

The square root of 6651779258 is about 81558.4407526284. The cubic root of 6651779258 is about 1880.6700548409.

The spelling of 6651779258 in words is "six billion, six hundred fifty-one million, seven hundred seventy-nine thousand, two hundred fifty-eight".