6650574257 has 2 divisors, whose sum is σ = 6650574258. Its totient is φ = 6650574256.

The previous prime is 6650574253. The next prime is 6650574311. The reversal of 6650574257 is 7524750566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4457431696 + 2193142561 = 66764^2 + 46831^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650574257 - 2² = 6650574253 is a prime.

It is a super-2 number, since 2×6650574257² = 88460275895742204098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6650574251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325287128 + 3325287129.

It is an arithmetic number, because the mean of its divisors is an integer number (3325287129).

Almost surely, 2^6650574257 is an apocalyptic number.

It is an amenable number.

6650574257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650574257 is an equidigital number, since it uses as much as digits as its factorization.

6650574257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764000, while the sum is 47.

The square root of 6650574257 is about 81551.0530710671. The cubic root of 6650574257 is about 1880.5564839166.

The spelling of 6650574257 in words is "six billion, six hundred fifty million, five hundred seventy-four thousand, two hundred fifty-seven".