66031413 has 16 divisors (see below), whose sum is σ = 104994816. Its totient is φ = 36091440.

The previous prime is 66031411. The next prime is 66031423. The reversal of 66031413 is 31413066.

It is not a de Polignac number, because 66031413 - 2¹ = 66031411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66031411) 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, 67873 + ... + 68838.

It is an arithmetic number, because the mean of its divisors is an integer number (6562176).

Almost surely, 2^66031413 is an apocalyptic number.

It is an amenable number.

66031413 is a deficient number, since it is larger than the sum of its proper divisors (38963403).

66031413 is a wasteful number, since it uses less digits than its factorization.

66031413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136744.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66031413 is about 8125.9715111487. The cubic root of 66031413 is about 404.1881067782.

Adding to 66031413 its reverse (31413066), we get a palindrome (97444479).

The spelling of 66031413 in words is "sixty-six million, thirty-one thousand, four hundred thirteen".