66611504 has 10 divisors (see below), whose sum is σ = 129059820. Its totient is φ = 33305744.

The previous prime is 66611497. The next prime is 66611509. The reversal of 66611504 is 40511666.

66611504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66611509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2081594 + ... + 2081625.

It is an arithmetic number, because the mean of its divisors is an integer number (12905982).

Almost surely, 2^66611504 is an apocalyptic number.

It is an amenable number.

66611504 is a deficient number, since it is larger than the sum of its proper divisors (62448316).

66611504 is a wasteful number, since it uses less digits than its factorization.

66611504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163227 (or 4163221 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66611504 is about 8161.5871005583. The cubic root of 66611504 is about 405.3682653509.

The spelling of 66611504 in words is "sixty-six million, six hundred eleven thousand, five hundred four".