66311906 has 8 divisors (see below), whose sum is σ = 99503040. Its totient is φ = 33144228.

The previous prime is 66311899. The next prime is 66311923. The reversal of 66311906 is 60911366.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6035 + ... + 13001.

It is an arithmetic number, because the mean of its divisors is an integer number (12437880).

Almost surely, 2^66311906 is an apocalyptic number.

66311906 is a deficient number, since it is larger than the sum of its proper divisors (33191134).

66311906 is a wasteful number, since it uses less digits than its factorization.

66311906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11728.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 66311906 is about 8143.2122654392. The cubic root of 66311906 is about 404.7596114477.

The spelling of 66311906 in words is "sixty-six million, three hundred eleven thousand, nine hundred six".