6610661091 has 6 divisors (see below), whose sum is σ = 9548732700. Its totient is φ = 4407107388.

The previous prime is 6610661033. The next prime is 6610661093. The reversal of 6610661091 is 1901660166.

It is not a de Polignac number, because 6610661091 - 2⁷ = 6610660963 is a prime.

It is a super-2 number, since 2×6610661091² = 87401680120122620562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6610661093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367258941 + ... + 367258958.

It is an arithmetic number, because the mean of its divisors is an integer number (1591455450).

Almost surely, 2^6610661091 is an apocalyptic number.

6610661091 is a deficient number, since it is larger than the sum of its proper divisors (2938071609).

6610661091 is a wasteful number, since it uses less digits than its factorization.

6610661091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734517905 (or 734517902 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 6610661091 is about 81305.9720500284. The cubic root of 6610661091 is about 1876.7869036592.

The spelling of 6610661091 in words is "six billion, six hundred ten million, six hundred sixty-one thousand, ninety-one".