66400315 has 8 divisors (see below), whose sum is σ = 79735248. Its totient is φ = 53083680.

The previous prime is 66400309. The next prime is 66400349. The reversal of 66400315 is 51300466.

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

It is not a de Polignac number, because 66400315 - 2⁹ = 66399803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66400315.

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, 5389 + ... + 12721.

It is an arithmetic number, because the mean of its divisors is an integer number (9966906).

Almost surely, 2^66400315 is an apocalyptic number.

66400315 is a deficient number, since it is larger than the sum of its proper divisors (13334933).

66400315 is a wasteful number, since it uses less digits than its factorization.

66400315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9149.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66400315 is about 8148.6388433897. The cubic root of 66400315 is about 404.9394107400.

The spelling of 66400315 in words is "sixty-six million, four hundred thousand, three hundred fifteen".