66940325 has 24 divisors (see below), whose sum is σ = 89056800. Its totient is φ = 49757760.

The previous prime is 66940319. The next prime is 66940333. The reversal of 66940325 is 52304966.

It is not a de Polignac number, because 66940325 - 2⁴ = 66940309 is a prime.

It is a super-2 number, since 2×66940325² = 8962014222211250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23846 + ... + 26504.

It is an arithmetic number, because the mean of its divisors is an integer number (3710700).

Almost surely, 2^66940325 is an apocalyptic number.

It is an amenable number.

66940325 is a deficient number, since it is larger than the sum of its proper divisors (22116475).

66940325 is a wasteful number, since it uses less digits than its factorization.

66940325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66940325 is about 8181.7067290389. The cubic root of 66940325 is about 406.0341907029.

The spelling of 66940325 in words is "sixty-six million, nine hundred forty thousand, three hundred twenty-five".