66260631 has 8 divisors (see below), whose sum is σ = 92188800. Its totient is φ = 42253112.

The previous prime is 66260629. The next prime is 66260639. The reversal of 66260631 is 13606266.

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 66260631 - 2¹ = 66260629 is a prime.

It is a super-2 number, since 2×66260631² = 8780942441036322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66260639) 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, 480081 + ... + 480218.

It is an arithmetic number, because the mean of its divisors is an integer number (11523600).

Almost surely, 2^66260631 is an apocalyptic number.

66260631 is a deficient number, since it is larger than the sum of its proper divisors (25928169).

66260631 is a wasteful number, since it uses less digits than its factorization.

66260631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960325.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66260631 is about 8140.0633289920. The cubic root of 66260631 is about 404.6552591429.

Adding to 66260631 its reverse (13606266), we get a palindrome (79866897).

The spelling of 66260631 in words is "sixty-six million, two hundred sixty thousand, six hundred thirty-one".