6690295257 has 16 divisors (see below), whose sum is σ = 9392232000. Its totient is φ = 4224394944.

The previous prime is 6690295207. The next prime is 6690295279. The reversal of 6690295257 is 7525920966.

It is not a de Polignac number, because 6690295257 - 2¹² = 6690291161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6690295207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260719 + ... + 285227.

It is an arithmetic number, because the mean of its divisors is an integer number (587014500).

Almost surely, 2^6690295257 is an apocalyptic number.

It is an amenable number.

6690295257 is a deficient number, since it is larger than the sum of its proper divisors (2701936743).

6690295257 is a wasteful number, since it uses less digits than its factorization.

6690295257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29320.

The product of its (nonzero) digits is 2041200, while the sum is 51.

The square root of 6690295257 is about 81794.2250834373. The cubic root of 6690295257 is about 1884.2929714535.

The spelling of 6690295257 in words is "six billion, six hundred ninety million, two hundred ninety-five thousand, two hundred fifty-seven".