66014987 has 6 divisors (see below), whose sum is σ = 69672708. Its totient is φ = 62540172.

The previous prime is 66014983. The next prime is 66014989. The reversal of 66014987 is 78941066.

It is not a de Polignac number, because 66014987 - 2² = 66014983 is a prime.

It is a super-2 number, since 2×66014987² = 8715957017220338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66014983) 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 5 ways as a sum of consecutive naturals, for example, 91073 + ... + 91794.

It is an arithmetic number, because the mean of its divisors is an integer number (11612118).

Almost surely, 2^66014987 is an apocalyptic number.

66014987 is a deficient number, since it is larger than the sum of its proper divisors (3657721).

66014987 is a wasteful number, since it uses less digits than its factorization.

66014987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182905 (or 182886 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 66014987 is about 8124.9607383667. The cubic root of 66014987 is about 404.1545886685.

The spelling of 66014987 in words is "sixty-six million, fourteen thousand, nine hundred eighty-seven".