66645153 has 16 divisors (see below), whose sum is σ = 99715200. Its totient is φ = 43988400.

The previous prime is 66645149. The next prime is 66645169. The reversal of 66645153 is 35154666.

It is not a de Polignac number, because 66645153 - 2² = 66645149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66645193) 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, 9493 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (6232200).

Almost surely, 2^66645153 is an apocalyptic number.

It is an amenable number.

66645153 is a deficient number, since it is larger than the sum of its proper divisors (33070047).

66645153 is a wasteful number, since it uses less digits than its factorization.

66645153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24549 (or 24543 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66645153 is about 8163.6482653284. The cubic root of 66645153 is about 405.4365115235.

The spelling of 66645153 in words is "sixty-six million, six hundred forty-five thousand, one hundred fifty-three".