66945153 has 16 divisors (see below), whose sum is σ = 98611200. Its totient is φ = 40057680.

The previous prime is 66945107. The next prime is 66945163. The reversal of 66945153 is 35154966.

It is not a de Polignac number, because 66945153 - 2⁸ = 66944897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66945103) 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, 10233 + ... + 15446.

It is an arithmetic number, because the mean of its divisors is an integer number (6163200).

Almost surely, 2^66945153 is an apocalyptic number.

It is an amenable number.

66945153 is a deficient number, since it is larger than the sum of its proper divisors (31666047).

66945153 is a wasteful number, since it uses less digits than its factorization.

66945153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25772.

The product of its digits is 97200, while the sum is 39.

The square root of 66945153 is about 8182.0017721826. The cubic root of 66945153 is about 406.0439520635.

The spelling of 66945153 in words is "sixty-six million, nine hundred forty-five thousand, one hundred fifty-three".