66525137 has 16 divisors (see below), whose sum is σ = 80424960. Its totient is φ = 53754192.

The previous prime is 66525133. The next prime is 66525143. The reversal of 66525137 is 73152566.

It is not a de Polignac number, because 66525137 - 2² = 66525133 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66525097 and 66525106.

It is not an unprimeable number, because it can be changed into a prime (66525133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28538 + ... + 30780.

It is an arithmetic number, because the mean of its divisors is an integer number (5026560).

Almost surely, 2^66525137 is an apocalyptic number.

It is an amenable number.

66525137 is a deficient number, since it is larger than the sum of its proper divisors (13899823).

66525137 is a wasteful number, since it uses less digits than its factorization.

66525137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492.

The product of its digits is 37800, while the sum is 35.

The square root of 66525137 is about 8156.2943178873. The cubic root of 66525137 is about 405.1929924073.

The spelling of 66525137 in words is "sixty-six million, five hundred twenty-five thousand, one hundred thirty-seven".