66410531 has 8 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 60266440.

The previous prime is 66410521. The next prime is 66410543. The reversal of 66410531 is 13501466.

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 66410531 - 2¹⁴ = 66394147 is a prime.

It is a super-2 number, since 2×66410531² = 8820717255403922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66410531.

It is not an unprimeable number, because it can be changed into a prime (66410521) 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, 1550 + ... + 11628.

It is an arithmetic number, because the mean of its divisors is an integer number (9072000).

Almost surely, 2^66410531 is an apocalyptic number.

66410531 is a deficient number, since it is larger than the sum of its proper divisors (6165469).

66410531 is a wasteful number, since it uses less digits than its factorization.

66410531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10689.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66410531 is about 8149.2656724394. The cubic root of 66410531 is about 404.9601769511.

Adding to 66410531 its reverse (13501466), we get a palindrome (79911997).

The spelling of 66410531 in words is "sixty-six million, four hundred ten thousand, five hundred thirty-one".