66499504 has 10 divisors (see below), whose sum is σ = 128842820. Its totient is φ = 33249744.

The previous prime is 66499481. The next prime is 66499519. The reversal of 66499504 is 40599466.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2078094 + ... + 2078125.

It is an arithmetic number, because the mean of its divisors is an integer number (12884282).

Almost surely, 2^66499504 is an apocalyptic number.

It is an amenable number.

66499504 is a deficient number, since it is larger than the sum of its proper divisors (62343316).

66499504 is a wasteful number, since it uses less digits than its factorization.

66499504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156227 (or 4156221 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 66499504 is about 8154.7228033821. The cubic root of 66499504 is about 405.1409436795.

The spelling of 66499504 in words is "sixty-six million, four hundred ninety-nine thousand, five hundred four".