66625635 has 32 divisors (see below), whose sum is σ = 113467392. Its totient is φ = 33267200.

The previous prime is 66625631. The next prime is 66625639. The reversal of 66625635 is 53652666.

66625635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66625631) and next prime (66625639).

It is not a de Polignac number, because 66625635 - 2² = 66625631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66625593 and 66625602.

It is not an unprimeable number, because it can be changed into a prime (66625631) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 57310 + ... + 58460.

It is an arithmetic number, because the mean of its divisors is an integer number (3545856).

Almost surely, 2^66625635 is an apocalyptic number.

66625635 is a deficient number, since it is larger than the sum of its proper divisors (46841757).

66625635 is a wasteful number, since it uses less digits than its factorization.

66625635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403.

The product of its digits is 194400, while the sum is 39.

The square root of 66625635 is about 8162.4527563717. The cubic root of 66625635 is about 405.3969283375.

The spelling of 66625635 in words is "sixty-six million, six hundred twenty-five thousand, six hundred thirty-five".