66310645 has 16 divisors (see below), whose sum is σ = 81305280. Its totient is φ = 51905664.

The previous prime is 66310639. The next prime is 66310649. The reversal of 66310645 is 54601366.

It is a cyclic number.

It is not a de Polignac number, because 66310645 - 2²³ = 57922037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66310649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50082 + ... + 51388.

It is an arithmetic number, because the mean of its divisors is an integer number (5081580).

Almost surely, 2^66310645 is an apocalyptic number.

It is an amenable number.

66310645 is a deficient number, since it is larger than the sum of its proper divisors (14994635).

66310645 is a wasteful number, since it uses less digits than its factorization.

66310645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66310645 is about 8143.1348386233. The cubic root of 66310645 is about 404.7570457691.

The spelling of 66310645 in words is "sixty-six million, three hundred ten thousand, six hundred forty-five".