66402241 has 8 divisors (see below), whose sum is σ = 67433184. Its totient is φ = 65376960.

The previous prime is 66402239. The next prime is 66402251. The reversal of 66402241 is 14220466.

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

It is a cyclic number.

It is not a de Polignac number, because 66402241 - 2¹ = 66402239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66402251) 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, 26265 + ... + 28681.

It is an arithmetic number, because the mean of its divisors is an integer number (8429148).

Almost surely, 2^66402241 is an apocalyptic number.

It is an amenable number.

66402241 is a deficient number, since it is larger than the sum of its proper divisors (1030943).

66402241 is a wasteful number, since it uses less digits than its factorization.

66402241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 66402241 is about 8148.7570217795. The cubic root of 66402241 is about 404.9433259110.

The spelling of 66402241 in words is "sixty-six million, four hundred two thousand, two hundred forty-one".