66103660 has 48 divisors (see below), whose sum is σ = 167005440. Its totient is φ = 21470400.

The previous prime is 66103643. The next prime is 66103669. The reversal of 66103660 is 6630166.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (66103669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9766 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (3479280).

Almost surely, 2^66103660 is an apocalyptic number.

It is an amenable number.

66103660 is an abundant number, since it is smaller than the sum of its proper divisors (100901780).

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

66103660 is a wasteful number, since it uses less digits than its factorization.

66103660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24886 (or 24884 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 66103660 is about 8130.4157335280. The cubic root of 66103660 is about 404.3354645950.

The spelling of 66103660 in words is "sixty-six million, one hundred three thousand, six hundred sixty".