66789942 has 8 divisors (see below), whose sum is σ = 133579896. Its totient is φ = 22263312.

The previous prime is 66789941. The next prime is 66789949. The reversal of 66789942 is 24998766.

It is a happy number.

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

66789942 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66789941) 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, 5565823 + ... + 5565834.

It is an arithmetic number, because the mean of its divisors is an integer number (16697487).

Almost surely, 2^66789942 is an apocalyptic number.

66789942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66789942 is a wasteful number, since it uses less digits than its factorization.

66789942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131662.

The product of its digits is 1306368, while the sum is 51.

The square root of 66789942 is about 8172.5113643237. The cubic root of 66789942 is about 405.7299076390.

It can be divided in two parts, 667 and 89942, that added together give a palindrome (90609).

The spelling of 66789942 in words is "sixty-six million, seven hundred eighty-nine thousand, nine hundred forty-two".