66725013 has 8 divisors (see below), whose sum is σ = 89248608. Its totient is φ = 44342384.

The previous prime is 66725003. The next prime is 66725041. The reversal of 66725013 is 31052766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66725013 - 2⁴ = 66724997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66725003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34131 + ... + 36032.

It is an arithmetic number, because the mean of its divisors is an integer number (11156076).

Almost surely, 2^66725013 is an apocalyptic number.

It is an amenable number.

66725013 is a deficient number, since it is larger than the sum of its proper divisors (22523595).

66725013 is a wasteful number, since it uses less digits than its factorization.

66725013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70483.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66725013 is about 8168.5379964838. The cubic root of 66725013 is about 405.5983899407.

Adding to 66725013 its reverse (31052766), we get a palindrome (97777779).

The spelling of 66725013 in words is "sixty-six million, seven hundred twenty-five thousand, thirteen".