66032387 has 16 divisors (see below), whose sum is σ = 70348800. Its totient is φ = 61888320.

The previous prime is 66032381. The next prime is 66032389. The reversal of 66032387 is 78323066.

It is a cyclic number.

It is not a de Polignac number, because 66032387 - 2⁴ = 66032371 is a prime.

It is a super-2 number, since 2×66032387² = 8720552265835538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66032381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144263 + ... + 144719.

It is an arithmetic number, because the mean of its divisors is an integer number (4396800).

Almost surely, 2^66032387 is an apocalyptic number.

66032387 is a deficient number, since it is larger than the sum of its proper divisors (4316413).

66032387 is a wasteful number, since it uses less digits than its factorization.

66032387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 66032387 is about 8126.0314422232. The cubic root of 66032387 is about 404.1900941014.

The spelling of 66032387 in words is "sixty-six million, thirty-two thousand, three hundred eighty-seven".