66013031 has 16 divisors (see below), whose sum is σ = 76930560. Its totient is φ = 55476960.

The previous prime is 66013007. The next prime is 66013061. The reversal of 66013031 is 13031066.

It is not a de Polignac number, because 66013031 - 2¹⁴ = 65996647 is a prime.

It is a super-2 number, since 2×66013031² = 8715440523613922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66012994 and 66013012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157340 + ... + 157758.

It is an arithmetic number, because the mean of its divisors is an integer number (4808160).

Almost surely, 2^66013031 is an apocalyptic number.

66013031 is a deficient number, since it is larger than the sum of its proper divisors (10917529).

66013031 is a wasteful number, since it uses less digits than its factorization.

66013031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 66013031 is about 8124.8403676626. The cubic root of 66013031 is about 404.1505969780.

Adding to 66013031 its reverse (13031066), we get a palindrome (79044097).

The spelling of 66013031 in words is "sixty-six million, thirteen thousand, thirty-one".