6655166501 has 4 divisors (see below), whose sum is σ = 6719779872. Its totient is φ = 6590553132.

The previous prime is 6655166491. The next prime is 6655166519. The reversal of 6655166501 is 1056615566.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1056615566 = 2 ⋅528307783.

It is a cyclic number.

It is not a de Polignac number, because 6655166501 - 2²² = 6650972197 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 (6655166561) 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, 32306531 + ... + 32306736.

It is an arithmetic number, because the mean of its divisors is an integer number (1679944968).

Almost surely, 2^6655166501 is an apocalyptic number.

It is an amenable number.

6655166501 is a deficient number, since it is larger than the sum of its proper divisors (64613371).

6655166501 is a wasteful number, since it uses less digits than its factorization.

6655166501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64613370.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 6655166501 is about 81579.2038512267. The cubic root of 6655166501 is about 1880.9892278640.

The spelling of 6655166501 in words is "six billion, six hundred fifty-five million, one hundred sixty-six thousand, five hundred one".