66746416 has 40 divisors (see below), whose sum is σ = 141540048. Its totient is φ = 30240000.

The previous prime is 66746377. The next prime is 66746417. The reversal of 66746416 is 61464766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66746417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94866 + ... + 95566.

Almost surely, 2^66746416 is an apocalyptic number.

It is an amenable number.

66746416 is an abundant number, since it is smaller than the sum of its proper divisors (74793632).

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

66746416 is a wasteful number, since it uses less digits than its factorization.

66746416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1255 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 66746416 is about 8169.8479790018. The cubic root of 66746416 is about 405.6417524616.

The spelling of 66746416 in words is "sixty-six million, seven hundred forty-six thousand, four hundred sixteen".