6616156667 has 4 divisors (see below), whose sum is σ = 6674706840. Its totient is φ = 6557606496.

The previous prime is 6616156661. The next prime is 6616156699. The reversal of 6616156667 is 7666516166.

6616156667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7666516166 = 2 ⋅3833258083.

It is a cyclic number.

It is not a de Polignac number, because 6616156667 - 2⁸ = 6616156411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6616156661) 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, 29274917 + ... + 29275142.

It is an arithmetic number, because the mean of its divisors is an integer number (1668676710).

Almost surely, 2^6616156667 is an apocalyptic number.

6616156667 is a deficient number, since it is larger than the sum of its proper divisors (58550173).

6616156667 is a wasteful number, since it uses less digits than its factorization.

6616156667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58550172.

The product of its digits is 1632960, while the sum is 50.

The square root of 6616156667 is about 81339.7606770514. The cubic root of 6616156667 is about 1877.3068298893.

The spelling of 6616156667 in words is "six billion, six hundred sixteen million, one hundred fifty-six thousand, six hundred sixty-seven".