5121666 has 24 divisors (see below), whose sum is σ = 12106224. Its totient is φ = 1551960.

The previous prime is 5121653. The next prime is 5121667. The reversal of 5121666 is 6661215.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5121667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12736 + ... + 13131.

It is an arithmetic number, because the mean of its divisors is an integer number (504426).

Almost surely, 2^5121666 is an apocalyptic number.

5121666 is an abundant number, since it is smaller than the sum of its proper divisors (6984558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5121666 is a wasteful number, since it uses less digits than its factorization.

5121666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25886 (or 25883 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 5121666 is about 2263.1098073227. The cubic root of 5121666 is about 172.3734673846.

The spelling of 5121666 in words is "five million, one hundred twenty-one thousand, six hundred sixty-six".