6697569061 has 4 divisors (see below), whose sum is σ = 6698260300. Its totient is φ = 6696877824.

The previous prime is 6697569041. The next prime is 6697569071. The reversal of 6697569061 is 1609657966.

It is the 33411-st star number.

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 6468984900 + 228584161 = 80430^2 + 15119^2 .

It is a 4-Lehmer number, since φ(6697569061) divides (6697569061-1)⁴.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6697569061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6697568993 and 6697569011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6697569041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330876 + ... + 350533.

It is an arithmetic number, because the mean of its divisors is an integer number (1674565075).

Almost surely, 2^6697569061 is an apocalyptic number.

It is an amenable number.

6697569061 is a deficient number, since it is larger than the sum of its proper divisors (691239).

6697569061 is an equidigital number, since it uses as much as digits as its factorization.

6697569061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691238.

The product of its (nonzero) digits is 3674160, while the sum is 55.

The square root of 6697569061 is about 81838.6770482026. The cubic root of 6697569061 is about 1884.9756026928.

The spelling of 6697569061 in words is "six billion, six hundred ninety-seven million, five hundred sixty-nine thousand, sixty-one".