66369121 has 8 divisors (see below), whose sum is σ = 81685184. Its totient is φ = 52511760.

The previous prime is 66369113. The next prime is 66369131. The reversal of 66369121 is 12196366.

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

It is not a de Polignac number, because 66369121 - 2³ = 66369113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66369101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364575 + ... + 364756.

It is an arithmetic number, because the mean of its divisors is an integer number (10210648).

Almost surely, 2^66369121 is an apocalyptic number.

It is an amenable number.

66369121 is a deficient number, since it is larger than the sum of its proper divisors (15316063).

66369121 is a wasteful number, since it uses less digits than its factorization.

66369121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729351.

The product of its digits is 11664, while the sum is 34.

The square root of 66369121 is about 8146.7245565319. The cubic root of 66369121 is about 404.8759890601.

The spelling of 66369121 in words is "sixty-six million, three hundred sixty-nine thousand, one hundred twenty-one".