531427666 has 16 divisors (see below), whose sum is σ = 993839040. Its totient is φ = 207049680.

The previous prime is 531427651. The next prime is 531427681. The reversal of 531427666 is 666724135.

It is an interprime number because it is at equal distance from previous prime (531427651) and next prime (531427681).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1725261 + ... + 1725568.

It is an arithmetic number, because the mean of its divisors is an integer number (62114940).

Almost surely, 2^531427666 is an apocalyptic number.

531427666 is a deficient number, since it is larger than the sum of its proper divisors (462411374).

531427666 is a wasteful number, since it uses less digits than its factorization.

531427666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450849.

The product of its digits is 181440, while the sum is 40.

The square root of 531427666 is about 23052.7149377248. The cubic root of 531427666 is about 809.9932255695.

The spelling of 531427666 in words is "five hundred thirty-one million, four hundred twenty-seven thousand, six hundred sixty-six".