5131666 has 16 divisors (see below), whose sum is σ = 8049600. Its totient is φ = 2450448.

The previous prime is 5131657. The next prime is 5131673. The reversal of 5131666 is 6661315.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5545 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (503100).

Almost surely, 2^5131666 is an apocalyptic number.

5131666 is a deficient number, since it is larger than the sum of its proper divisors (2917934).

5131666 is a wasteful number, since it uses less digits than its factorization.

5131666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its digits is 3240, while the sum is 28.

The square root of 5131666 is about 2265.3180792110. The cubic root of 5131666 is about 172.4855802551.

The spelling of 5131666 in words is "five million, one hundred thirty-one thousand, six hundred sixty-six".