66080187 has 12 divisors (see below), whose sum is σ = 98029360. Its totient is φ = 42862608.

The previous prime is 66080171. The next prime is 66080227. The reversal of 66080187 is 78108066.

It is not a de Polignac number, because 66080187 - 2⁴ = 66080171 is a prime.

It is a super-2 number, since 2×66080187² = 8733182227909938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66080137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98887 + ... + 99552.

Almost surely, 2^66080187 is an apocalyptic number.

66080187 is a deficient number, since it is larger than the sum of its proper divisors (31949173).

66080187 is a wasteful number, since it uses less digits than its factorization.

66080187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198482 (or 198479 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 66080187 is about 8128.9720752380. The cubic root of 66080187 is about 404.2875999232.

The spelling of 66080187 in words is "sixty-six million, eighty thousand, one hundred eighty-seven".