66947008 has 14 divisors (see below), whose sum is σ = 132848096. Its totient is φ = 33473472.

The previous prime is 66946981. The next prime is 66947009. The reversal of 66947008 is 80074966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66947009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522960 + ... + 523087.

Almost surely, 2^66947008 is an apocalyptic number.

It is an amenable number.

66947008 is a deficient number, since it is larger than the sum of its proper divisors (65901088).

66947008 is a wasteful number, since it uses less digits than its factorization.

66947008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046059 (or 1046049 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 66947008 is about 8182.1151299649. The cubic root of 66947008 is about 406.0477024200.

The spelling of 66947008 in words is "sixty-six million, nine hundred forty-seven thousand, eight".