66967960 has 32 divisors (see below), whose sum is σ = 155876400. Its totient is φ = 25863040.

The previous prime is 66967939. The next prime is 66967987. The reversal of 66967960 is 6976966.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27706 + ... + 30025.

Almost surely, 2^66967960 is an apocalyptic number.

It is an amenable number.

66967960 is an abundant number, since it is smaller than the sum of its proper divisors (88908440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66967960 is a wasteful number, since it uses less digits than its factorization.

66967960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57771 (or 57767 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 66967960 is about 8183.3953833357. The cubic root of 66967960 is about 406.0900574326.

The spelling of 66967960 in words is "sixty-six million, nine hundred sixty-seven thousand, nine hundred sixty".