66132747 has 8 divisors (see below), whose sum is σ = 97974480.
Its totient is φ = 44088480.
The previous prime is 66132739. The next prime is 66132763. The reversal of 66132747 is 74723166.
It is not a de Polignac number, because 66132747 - 23 = 66132739 is a prime.
It is not an unprimeable number, because it can be changed into a prime (66132707) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1224654 + ... + 1224707.
It is an arithmetic number, because the mean of its divisors is an integer number (12246810).
Almost surely, 266132747 is an apocalyptic number.
66132747 is a deficient number, since it is larger than the sum of its proper divisors (31841733).
66132747 is a wasteful number, since it uses less digits than its factorization.
66132747 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2449370 (or 2449364 counting only the distinct ones).
The product of its digits is 42336, while the sum is 36.
The square root of 66132747 is about 8132.2043137147.
The cubic root of 66132747 is about 404.3947612667.
The spelling of 66132747 in words is "sixty-six million, one hundred thirty-two thousand, seven hundred forty-seven".