6994522057 has 4 divisors (see below), whose sum is σ = 6994722196. Its totient is φ = 6994321920.

The previous prime is 6994522037. The next prime is 6994522097. The reversal of 6994522057 is 7502254996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314565696 + 6679956361 = 17736^2 + 81731^2 .

It is a cyclic number.

It is not a de Polignac number, because 6994522057 - 2²³ = 6986133449 is a prime.

It is a super-2 number, since 2×6994522057² = 97846677611719022498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6994522057.

It is not an unprimeable number, because it can be changed into a prime (6994522027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32388 + ... + 122629.

It is an arithmetic number, because the mean of its divisors is an integer number (1748680549).

Almost surely, 2^6994522057 is an apocalyptic number.

It is an amenable number.

6994522057 is a deficient number, since it is larger than the sum of its proper divisors (200139).

6994522057 is a wasteful number, since it uses less digits than its factorization.

6994522057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200138.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 6994522057 is about 83633.2592752429. The cubic root of 6994522057 is about 1912.4320559797.

The spelling of 6994522057 in words is "six billion, nine hundred ninety-four million, five hundred twenty-two thousand, fifty-seven".