66134431 has 8 divisors (see below), whose sum is σ = 73330128. Its totient is φ = 59136000.

The previous prime is 66134417. The next prime is 66134449. The reversal of 66134431 is 13443166.

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

It is not a de Polignac number, because 66134431 - 2¹⁵ = 66101663 is a prime.

It is a super-2 number, since 2×66134431² = 8747525927387522, 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 66134431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66134401) 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, 48610 + ... + 49951.

It is an arithmetic number, because the mean of its divisors is an integer number (9166266).

Almost surely, 2^66134431 is an apocalyptic number.

66134431 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66134431 is a deficient number, since it is larger than the sum of its proper divisors (7195697).

66134431 is a wasteful number, since it uses less digits than its factorization.

66134431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98633.

The product of its digits is 5184, while the sum is 28.

The square root of 66134431 is about 8132.3078520184. The cubic root of 66134431 is about 404.3981937316.

Adding to 66134431 its reverse (13443166), we get a palindrome (79577597).

The spelling of 66134431 in words is "sixty-six million, one hundred thirty-four thousand, four hundred thirty-one".