66869722 has 8 divisors (see below), whose sum is σ = 100346400. Its totient is φ = 33420924.

The previous prime is 66869689. The next prime is 66869723. The reversal of 66869722 is 22796866.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (66869723) 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, 729 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (12543300).

Almost surely, 2^66869722 is an apocalyptic number.

66869722 is a deficient number, since it is larger than the sum of its proper divisors (33476678).

66869722 is a wasteful number, since it uses less digits than its factorization.

66869722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13940.

The product of its digits is 435456, while the sum is 46.

The square root of 66869722 is about 8177.3909041943. The cubic root of 66869722 is about 405.8913902984.

The spelling of 66869722 in words is "sixty-six million, eight hundred sixty-nine thousand, seven hundred twenty-two".