66133739 has 8 divisors (see below), whose sum is σ = 75633888. Its totient is φ = 56646720.

The previous prime is 66133709. The next prime is 66133741. The reversal of 66133739 is 93733166.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66133739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66133709) 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 7 ways as a sum of consecutive naturals, for example, 12749 + ... + 17169.

It is an arithmetic number, because the mean of its divisors is an integer number (9454236).

Almost surely, 2^66133739 is an apocalyptic number.

66133739 is a deficient number, since it is larger than the sum of its proper divisors (9500149).

66133739 is a wasteful number, since it uses less digits than its factorization.

66133739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6565.

The product of its digits is 61236, while the sum is 38.

The square root of 66133739 is about 8132.2653055591. The cubic root of 66133739 is about 404.3967832483.

The spelling of 66133739 in words is "sixty-six million, one hundred thirty-three thousand, seven hundred thirty-nine".