6601166157 has 4 divisors (see below), whose sum is σ = 8801554880. Its totient is φ = 4400777436.

The previous prime is 6601166149. The next prime is 6601166167. The reversal of 6601166157 is 7516611066.

6601166157 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6601166157 - 2³ = 6601166149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601166167) 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, 1100194357 + ... + 1100194362.

It is an arithmetic number, because the mean of its divisors is an integer number (2200388720).

Almost surely, 2^6601166157 is an apocalyptic number.

It is an amenable number.

6601166157 is a deficient number, since it is larger than the sum of its proper divisors (2200388723).

6601166157 is a wasteful number, since it uses less digits than its factorization.

6601166157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200388722.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 6601166157 is about 81247.5609295442. The cubic root of 6601166157 is about 1875.8879261845.

The spelling of 6601166157 in words is "six billion, six hundred one million, one hundred sixty-six thousand, one hundred fifty-seven".