7866149 has 4 divisors (see below), whose sum is σ = 7922880. Its totient is φ = 7809420.

The previous prime is 7866139. The next prime is 7866151. The reversal of 7866149 is 9416687.

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: 9416687 = 7 ⋅1345241.

It is a cyclic number.

It is not a de Polignac number, because 7866149 - 2¹² = 7862053 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 (7866139) 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, 28157 + ... + 28434.

It is an arithmetic number, because the mean of its divisors is an integer number (1980720).

Almost surely, 2^7866149 is an apocalyptic number.

It is an amenable number.

7866149 is a deficient number, since it is larger than the sum of its proper divisors (56731).

7866149 is a wasteful number, since it uses less digits than its factorization.

7866149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56730.

The product of its digits is 72576, while the sum is 41.

The square root of 7866149 is about 2804.6655772124. The cubic root of 7866149 is about 198.8782956581.

The spelling of 7866149 in words is "seven million, eight hundred sixty-six thousand, one hundred forty-nine".