66449196 has 36 divisors (see below), whose sum is σ = 183239784. Its totient is φ = 20136000.

The previous prime is 66449183. The next prime is 66449203. The reversal of 66449196 is 69194466.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83505 + ... + 84296.

It is an arithmetic number, because the mean of its divisors is an integer number (5089994).

Almost surely, 2^66449196 is an apocalyptic number.

66449196 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66449196 is an abundant number, since it is smaller than the sum of its proper divisors (116790588).

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

66449196 is a wasteful number, since it uses less digits than its factorization.

66449196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167822 (or 167817 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 66449196 is about 8151.6376268821. The cubic root of 66449196 is about 405.0387525790.

The spelling of 66449196 in words is "sixty-six million, four hundred forty-nine thousand, one hundred ninety-six".