66312305 has 8 divisors (see below), whose sum is σ = 79625472. Its totient is φ = 53016048.

The previous prime is 66312271. The next prime is 66312329. The reversal of 66312305 is 50321366.

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 66312305 - 2¹⁰ = 66311281 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, 7232 + ... + 13598.

It is an arithmetic number, because the mean of its divisors is an integer number (9953184).

Almost surely, 2^66312305 is an apocalyptic number.

It is an amenable number.

66312305 is a deficient number, since it is larger than the sum of its proper divisors (13313167).

66312305 is a wasteful number, since it uses less digits than its factorization.

66312305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8455.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 66312305 is about 8143.2367643339. The cubic root of 66312305 is about 404.7604232615.

The spelling of 66312305 in words is "sixty-six million, three hundred twelve thousand, three hundred five".