66052499 has 4 divisors (see below), whose sum is σ = 66227160. Its totient is φ = 65877840.

The previous prime is 66052489. The next prime is 66052501. The reversal of 66052499 is 99425066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66052499 - 2⁸ = 66052243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66052409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86762 + ... + 87519.

It is an arithmetic number, because the mean of its divisors is an integer number (16556790).

Almost surely, 2^66052499 is an apocalyptic number.

66052499 is a deficient number, since it is larger than the sum of its proper divisors (174661).

66052499 is a wasteful number, since it uses less digits than its factorization.

66052499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174660.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 66052499 is about 8127.2688524498. The cubic root of 66052499 is about 404.2311257142.

The spelling of 66052499 in words is "sixty-six million, fifty-two thousand, four hundred ninety-nine".