6615611071 has 2 divisors, whose sum is σ = 6615611072. Its totient is φ = 6615611070.

The previous prime is 6615611069. The next prime is 6615611089. The reversal of 6615611071 is 1701165166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6615611071 - 2¹ = 6615611069 is a prime.

Together with 6615611069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6615611971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307805535 + 3307805536.

It is an arithmetic number, because the mean of its divisors is an integer number (3307805536).

Almost surely, 2^6615611071 is an apocalyptic number.

6615611071 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615611071 is an equidigital number, since it uses as much as digits as its factorization.

6615611071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 6615611071 is about 81336.4067991696. The cubic root of 6615611071 is about 1877.2552249417.

The spelling of 6615611071 in words is "six billion, six hundred fifteen million, six hundred eleven thousand, seventy-one".