66102945 has 16 divisors (see below), whose sum is σ = 105993600. Its totient is φ = 35178624.

The previous prime is 66102931. The next prime is 66102961. The reversal of 66102945 is 54920166.

66102945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66102945 - 2⁸ = 66102689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2781 + ... + 11829.

It is an arithmetic number, because the mean of its divisors is an integer number (6624600).

Almost surely, 2^66102945 is an apocalyptic number.

It is an amenable number.

66102945 is a deficient number, since it is larger than the sum of its proper divisors (39890655).

66102945 is a wasteful number, since it uses less digits than its factorization.

66102945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9544.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66102945 is about 8130.3717627179. The cubic root of 66102945 is about 404.3340067791.

The spelling of 66102945 in words is "sixty-six million, one hundred two thousand, nine hundred forty-five".