66449395 has 8 divisors (see below), whose sum is σ = 80229456. Its totient is φ = 52832736.

The previous prime is 66449389. The next prime is 66449401. The reversal of 66449395 is 59394466.

It is an interprime number because it is at equal distance from previous prime (66449389) and next prime (66449401).

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 66449395 - 2⁵ = 66449363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39952 + ... + 41581.

It is an arithmetic number, because the mean of its divisors is an integer number (10028682).

Almost surely, 2^66449395 is an apocalyptic number.

66449395 is a deficient number, since it is larger than the sum of its proper divisors (13780061).

66449395 is a wasteful number, since it uses less digits than its factorization.

66449395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81701.

The product of its digits is 699840, while the sum is 46.

The square root of 66449395 is about 8151.6498330093. The cubic root of 66449395 is about 405.0391569111.

The spelling of 66449395 in words is "sixty-six million, four hundred forty-nine thousand, three hundred ninety-five".