66103544 has 32 divisors (see below), whose sum is σ = 135322320. Its totient is φ = 30087936.

The previous prime is 66103507. The next prime is 66103567. The reversal of 66103544 is 44530166.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3239 + ... + 11945.

Almost surely, 2^66103544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66103544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67661160).

66103544 is an abundant number, since it is smaller than the sum of its proper divisors (69218776).

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

66103544 is a wasteful number, since it uses less digits than its factorization.

66103544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8799 (or 8795 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66103544 is about 8130.4085998183. The cubic root of 66103544 is about 404.3352280829.

The spelling of 66103544 in words is "sixty-six million, one hundred three thousand, five hundred forty-four".