66465307 has 4 divisors (see below), whose sum is σ = 67306720. Its totient is φ = 65623896.

The previous prime is 66465299. The next prime is 66465353. The reversal of 66465307 is 70356466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70356466 = 2 ⋅35178233.

It is a cyclic number.

It is not a de Polignac number, because 66465307 - 2³ = 66465299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66465367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420588 + ... + 420745.

It is an arithmetic number, because the mean of its divisors is an integer number (16826680).

Almost surely, 2^66465307 is an apocalyptic number.

66465307 is a deficient number, since it is larger than the sum of its proper divisors (841413).

66465307 is an equidigital number, since it uses as much as digits as its factorization.

66465307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841412.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 66465307 is about 8152.6257733322. The cubic root of 66465307 is about 405.0714846130.

The spelling of 66465307 in words is "sixty-six million, four hundred sixty-five thousand, three hundred seven".