66739141 has 4 divisors (see below), whose sum is σ = 76273312. Its totient is φ = 57204972.

The previous prime is 66739133. The next prime is 66739151. The reversal of 66739141 is 14193766.

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 66739141 - 2³ = 66739133 is a prime.

It is a super-2 number, since 2×66739141² = 8908225882835762, 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 66739141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66739111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4767075 + ... + 4767088.

It is an arithmetic number, because the mean of its divisors is an integer number (19068328).

Almost surely, 2^66739141 is an apocalyptic number.

It is an amenable number.

66739141 is a deficient number, since it is larger than the sum of its proper divisors (9534171).

66739141 is an equidigital number, since it uses as much as digits as its factorization.

66739141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9534170.

The product of its digits is 27216, while the sum is 37.

The square root of 66739141 is about 8169.4027321463. The cubic root of 66739141 is about 405.6270143371.

The spelling of 66739141 in words is "sixty-six million, seven hundred thirty-nine thousand, one hundred forty-one".