66704125 has 8 divisors (see below), whose sum is σ = 83246904. Its totient is φ = 53363200.

The previous prime is 66704101. The next prime is 66704149. The reversal of 66704125 is 52140766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66704101) and next prime (66704149).

It can be written as a sum of positive squares in 4 ways, for example, as 14243076 + 52461049 = 3774^2 + 7243^2 .

It is not a de Polignac number, because 66704125 - 2⁷ = 66703997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266692 + ... + 266941.

It is an arithmetic number, because the mean of its divisors is an integer number (10405863).

Almost surely, 2^66704125 is an apocalyptic number.

It is an amenable number.

66704125 is a deficient number, since it is larger than the sum of its proper divisors (16542779).

66704125 is an equidigital number, since it uses as much as digits as its factorization.

66704125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533648 (or 533638 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66704125 is about 8167.2593322362. The cubic root of 66704125 is about 405.5560618691.

The spelling of 66704125 in words is "sixty-six million, seven hundred four thousand, one hundred twenty-five".