66647076 has 48 divisors (see below), whose sum is σ = 162195264. Its totient is φ = 21280896.

The previous prime is 66647071. The next prime is 66647083. The reversal of 66647076 is 67074666.

It is not an unprimeable number, because it can be changed into a prime (66647071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26130 + ... + 28566.

It is an arithmetic number, because the mean of its divisors is an integer number (3379068).

Almost surely, 2^66647076 is an apocalyptic number.

It is an amenable number.

66647076 is an abundant number, since it is smaller than the sum of its proper divisors (95548188).

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

66647076 is a wasteful number, since it uses less digits than its factorization.

66647076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 66647076 is about 8163.7660427036. The cubic root of 66647076 is about 405.4404110164.

The spelling of 66647076 in words is "sixty-six million, six hundred forty-seven thousand, seventy-six".