66334531 has 8 divisors (see below), whose sum is σ = 68027904. Its totient is φ = 64653000.

The previous prime is 66334501. The next prime is 66334537. The reversal of 66334531 is 13543366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66334531 - 2⁹ = 66334019 is a prime.

It is a super-2 number, since 2×66334531² = 8800540005979922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66334493 and 66334502.

It is not an unprimeable number, because it can be changed into a prime (66334537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8986 + ... + 14608.

It is an arithmetic number, because the mean of its divisors is an integer number (8503488).

Almost surely, 2^66334531 is an apocalyptic number.

66334531 is a deficient number, since it is larger than the sum of its proper divisors (1693373).

66334531 is a wasteful number, since it uses less digits than its factorization.

66334531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921.

The product of its digits is 19440, while the sum is 31.

The square root of 66334531 is about 8144.6013407656. The cubic root of 66334531 is about 404.8056396069.

Adding to 66334531 its reverse (13543366), we get a palindrome (79877897).

The spelling of 66334531 in words is "sixty-six million, three hundred thirty-four thousand, five hundred thirty-one".