66103680 has 64 divisors (see below), whose sum is σ = 210711600. Its totient is φ = 17627136.

The previous prime is 66103669. The next prime is 66103711. The reversal of 66103680 is 8630166.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15295 + ... + 19134.

Almost surely, 2^66103680 is an apocalyptic number.

66103680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66103680 is an abundant number, since it is smaller than the sum of its proper divisors (144607920).

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

66103680 is a wasteful number, since it uses less digits than its factorization.

66103680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451 (or 34439 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66103680 is about 8130.4169634773. The cubic root of 66103680 is about 404.3355053729.

The spelling of 66103680 in words is "sixty-six million, one hundred three thousand, six hundred eighty".