66068531 has 8 divisors (see below), whose sum is σ = 66619728. Its totient is φ = 65520000.

The previous prime is 66068521. The next prime is 66068557. The reversal of 66068531 is 13586066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66068531 is a prime.

It is a super-2 number, since 2×66068531² = 8730101576995922, 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 = 66068491 and 66068500.

It is not an unprimeable number, because it can be changed into a prime (66068521) by changing a digit.

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, 109631 + ... + 110231.

It is an arithmetic number, because the mean of its divisors is an integer number (8327466).

Almost surely, 2^66068531 is an apocalyptic number.

66068531 is a deficient number, since it is larger than the sum of its proper divisors (551197).

66068531 is a wasteful number, since it uses less digits than its factorization.

66068531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66068531 is about 8128.2551018038. The cubic root of 66068531 is about 404.2638275259.

The spelling of 66068531 in words is "sixty-six million, sixty-eight thousand, five hundred thirty-one".