66103944 has 32 divisors (see below), whose sum is σ = 166259520. Its totient is φ = 21901376.

The previous prime is 66103927. The next prime is 66103951. The reversal of 66103944 is 44930166.

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, 4239 + ... + 12254.

It is an arithmetic number, because the mean of its divisors is an integer number (5195610).

Almost surely, 2^66103944 is an apocalyptic number.

It is an amenable number.

66103944 is an abundant number, since it is smaller than the sum of its proper divisors (100155576).

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

66103944 is a wasteful number, since it uses less digits than its factorization.

66103944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16669 (or 16665 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66103944 is about 8130.4331987908. The cubic root of 66103944 is about 404.3360436406.

Subtracting from 66103944 its reverse (44930166), we obtain a triangular number (21173778 = T₆₅₀₇).

The spelling of 66103944 in words is "sixty-six million, one hundred three thousand, nine hundred forty-four".