66107145 has 32 divisors (see below), whose sum is σ = 116347392. Its totient is φ = 31848192.

The previous prime is 66107143. The next prime is 66107179. The reversal of 66107145 is 54170166.

It is not a de Polignac number, because 66107145 - 2¹ = 66107143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66107143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5559 + ... + 12771.

It is an arithmetic number, because the mean of its divisors is an integer number (3635856).

Almost surely, 2^66107145 is an apocalyptic number.

66107145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66107145 is a deficient number, since it is larger than the sum of its proper divisors (50240247).

66107145 is a wasteful number, since it uses less digits than its factorization.

66107145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 66107145 is about 8130.6300493873. The cubic root of 66107145 is about 404.3425700227.

The spelling of 66107145 in words is "sixty-six million, one hundred seven thousand, one hundred forty-five".