66311407 has 16 divisors (see below), whose sum is σ = 72316800. Its totient is φ = 60563968.

The previous prime is 66311393. The next prime is 66311417. The reversal of 66311407 is 70411366.

It is a cyclic number.

It is not a de Polignac number, because 66311407 - 2⁷ = 66311279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118773 + ... + 119329.

It is an arithmetic number, because the mean of its divisors is an integer number (4519800).

Almost surely, 2^66311407 is an apocalyptic number.

66311407 is a deficient number, since it is larger than the sum of its proper divisors (6005393).

66311407 is a wasteful number, since it uses less digits than its factorization.

66311407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 66311407 is about 8143.1816263669. The cubic root of 66311407 is about 404.7585961672.

The spelling of 66311407 in words is "sixty-six million, three hundred eleven thousand, four hundred seven".