66422765 has 8 divisors (see below), whose sum is σ = 83902560. Its totient is φ = 50341392.

The previous prime is 66422761. The next prime is 66422861. The reversal of 66422765 is 56722466.

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 66422765 - 2² = 66422761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66422761) 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, 349499 + ... + 349688.

It is an arithmetic number, because the mean of its divisors is an integer number (10487820).

Almost surely, 2^66422765 is an apocalyptic number.

It is an amenable number.

66422765 is a deficient number, since it is larger than the sum of its proper divisors (17479795).

66422765 is a wasteful number, since it uses less digits than its factorization.

66422765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699211.

The product of its digits is 120960, while the sum is 38.

The square root of 66422765 is about 8150.0162576525. The cubic root of 66422765 is about 404.9850423780.

The spelling of 66422765 in words is "sixty-six million, four hundred twenty-two thousand, seven hundred sixty-five".