66318405 has 8 divisors (see below), whose sum is σ = 106109472. Its totient is φ = 35369808.

The previous prime is 66318397. The next prime is 66318451. The reversal of 66318405 is 50481366.

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

It is not a de Polignac number, because 66318405 - 2³ = 66318397 is a prime.

It is a congruent 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, 2210599 + ... + 2210628.

It is an arithmetic number, because the mean of its divisors is an integer number (13263684).

Almost surely, 2^66318405 is an apocalyptic number.

It is an amenable number.

66318405 is a deficient number, since it is larger than the sum of its proper divisors (39791067).

66318405 is a wasteful number, since it uses less digits than its factorization.

66318405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421235.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 66318405 is about 8143.6112996631. The cubic root of 66318405 is about 404.7728340444.

The spelling of 66318405 in words is "sixty-six million, three hundred eighteen thousand, four hundred five".