66623008 has 12 divisors (see below), whose sum is σ = 131164110. Its totient is φ = 33311488.

The previous prime is 66623003. The next prime is 66623009. The reversal of 66623008 is 80032666.

It can be written as a sum of positive squares in only one way, i.e., 61905424 + 4717584 = 7868^2 + 2172^2 .

It is not an unprimeable number, because it can be changed into a prime (66623003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040953 + ... + 1041016.

Almost surely, 2^66623008 is an apocalyptic number.

It is an amenable number.

66623008 is a deficient number, since it is larger than the sum of its proper divisors (64541102).

66623008 is a wasteful number, since it uses less digits than its factorization.

66623008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081979 (or 2081971 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 66623008 is about 8162.2918350179. The cubic root of 66623008 is about 405.3916000994.

The spelling of 66623008 in words is "sixty-six million, six hundred twenty-three thousand, eight".