66187307 has 16 divisors (see below), whose sum is σ = 73846080. Its totient is φ = 59000832.

The previous prime is 66187283. The next prime is 66187333. The reversal of 66187307 is 70378166.

It is a cyclic number.

It is not a de Polignac number, because 66187307 - 2²² = 61993003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66187337) 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, 41843 + ... + 43395.

It is an arithmetic number, because the mean of its divisors is an integer number (4615380).

Almost surely, 2^66187307 is an apocalyptic number.

66187307 is a deficient number, since it is larger than the sum of its proper divisors (7658773).

66187307 is a wasteful number, since it uses less digits than its factorization.

66187307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 66187307 is about 8135.5581861357. The cubic root of 66187307 is about 404.5059402431.

The spelling of 66187307 in words is "sixty-six million, one hundred eighty-seven thousand, three hundred seven".