66528207 has 12 divisors (see below), whose sum is σ = 97450704. Its totient is φ = 43727040.

The previous prime is 66528173. The next prime is 66528227. The reversal of 66528207 is 70282566.

It is not a de Polignac number, because 66528207 - 2¹⁰ = 66527183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66528227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51418 + ... + 52695.

It is an arithmetic number, because the mean of its divisors is an integer number (8120892).

Almost surely, 2^66528207 is an apocalyptic number.

66528207 is a deficient number, since it is larger than the sum of its proper divisors (30922497).

66528207 is a wasteful number, since it uses less digits than its factorization.

66528207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104190 (or 104187 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 66528207 is about 8156.4825139272. The cubic root of 66528207 is about 405.1992252561.

The spelling of 66528207 in words is "sixty-six million, five hundred twenty-eight thousand, two hundred seven".