66547960 has 32 divisors (see below), whose sum is σ = 151068240. Its totient is φ = 26381824.

The previous prime is 66547939. The next prime is 66547963. The reversal of 66547960 is 6974566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66547963) 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 7 ways as a sum of consecutive naturals, for example, 2842 + ... + 11881.

Almost surely, 2^66547960 is an apocalyptic number.

It is an amenable number.

66547960 is an abundant number, since it is smaller than the sum of its proper divisors (84520280).

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

66547960 is a wasteful number, since it uses less digits than its factorization.

66547960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847 (or 14843 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 66547960 is about 8157.6933014180. The cubic root of 66547960 is about 405.2393240785.

The spelling of 66547960 in words is "sixty-six million, five hundred forty-seven thousand, nine hundred sixty".