66964236 has 12 divisors (see below), whose sum is σ = 156249912. Its totient is φ = 22321408.

The previous prime is 66964231. The next prime is 66964243. The reversal of 66964236 is 63246966.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (66964231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2790165 + ... + 2790188.

It is an arithmetic number, because the mean of its divisors is an integer number (13020826).

Almost surely, 2^66964236 is an apocalyptic number.

It is an amenable number.

66964236 is an abundant number, since it is smaller than the sum of its proper divisors (89285676).

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

66964236 is a wasteful number, since it uses less digits than its factorization.

66964236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580360 (or 5580358 counting only the distinct ones).

The product of its digits is 279936, while the sum is 42.

The square root of 66964236 is about 8183.1678462561. The cubic root of 66964236 is about 406.0825299154.

The spelling of 66964236 in words is "sixty-six million, nine hundred sixty-four thousand, two hundred thirty-six".