66159349 has 4 divisors (see below), whose sum is σ = 69641440. Its totient is φ = 62677260.

The previous prime is 66159347. The next prime is 66159361. The reversal of 66159349 is 94395166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66159349 - 2¹ = 66159347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66159347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741017 + ... + 1741054.

It is an arithmetic number, because the mean of its divisors is an integer number (17410360).

Almost surely, 2^66159349 is an apocalyptic number.

It is an amenable number.

66159349 is a deficient number, since it is larger than the sum of its proper divisors (3482091).

66159349 is a wasteful number, since it uses less digits than its factorization.

66159349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3482090.

The product of its digits is 174960, while the sum is 43.

The square root of 66159349 is about 8133.8397451634. The cubic root of 66159349 is about 404.4489768044.

The spelling of 66159349 in words is "sixty-six million, one hundred fifty-nine thousand, three hundred forty-nine".