6722665057 has 8 divisors (see below), whose sum is σ = 6753349512. Its totient is φ = 6692044800.

The previous prime is 6722665049. The next prime is 6722665067. The reversal of 6722665057 is 7505662276.

It can be written as a sum of positive squares in 4 ways, for example, as 1673709921 + 5048955136 = 40911^2 + 71056^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6722665057 - 2³ = 6722665049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6722664998 and 6722665016.

It is not an unprimeable number, because it can be changed into a prime (6722665067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200457 + ... + 231577.

It is an arithmetic number, because the mean of its divisors is an integer number (844168689).

Almost surely, 2^6722665057 is an apocalyptic number.

It is an amenable number.

6722665057 is a deficient number, since it is larger than the sum of its proper divisors (30684455).

6722665057 is a wasteful number, since it uses less digits than its factorization.

6722665057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32099.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The square root of 6722665057 is about 81991.8596996068. The cubic root of 6722665057 is about 1887.3270219213.

The spelling of 6722665057 in words is "six billion, seven hundred twenty-two million, six hundred sixty-five thousand, fifty-seven".