6666151 has 4 divisors (see below), whose sum is σ = 6808032. Its totient is φ = 6524272.

The previous prime is 6666137. The next prime is 6666157. The reversal of 6666151 is 1516666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6666151 - 2⁹ = 6665639 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666157) 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, 70870 + ... + 70963.

It is an arithmetic number, because the mean of its divisors is an integer number (1702008).

Almost surely, 2^6666151 is an apocalyptic number.

6666151 is a deficient number, since it is larger than the sum of its proper divisors (141881).

6666151 is a wasteful number, since it uses less digits than its factorization.

6666151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141880.

The product of its digits is 6480, while the sum is 31.

The square root of 6666151 is about 2581.8890371199. The cubic root of 6666151 is about 188.2023530420.

The spelling of 6666151 in words is "six million, six hundred sixty-six thousand, one hundred fifty-one".