66237742 has 8 divisors (see below), whose sum is σ = 99587376. Its totient is φ = 33041952.

The previous prime is 66237737. The next prime is 66237749. The reversal of 66237742 is 24773266.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66237749) 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, 37378 + ... + 39109.

It is an arithmetic number, because the mean of its divisors is an integer number (12448422).

Almost surely, 2^66237742 is an apocalyptic number.

66237742 is a deficient number, since it is larger than the sum of its proper divisors (33349634).

66237742 is a wasteful number, since it uses less digits than its factorization.

66237742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76922.

The product of its digits is 84672, while the sum is 37.

The square root of 66237742 is about 8138.6572602611. The cubic root of 66237742 is about 404.6086592198.

It can be divided in two parts, 6623 and 7742, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 66237742 in words is "sixty-six million, two hundred thirty-seven thousand, seven hundred forty-two".