66763328 has 14 divisors (see below), whose sum is σ = 132483606. Its totient is φ = 33381632.

The previous prime is 66763327. The next prime is 66763331. The reversal of 66763328 is 82336766.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 5798464 = 7808^2 + 2408^2 .

It is not an unprimeable number, because it can be changed into a prime (66763327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521525 + ... + 521652.

Almost surely, 2^66763328 is an apocalyptic number.

It is an amenable number.

66763328 is a deficient number, since it is larger than the sum of its proper divisors (65720278).

66763328 is a wasteful number, since it uses less digits than its factorization.

66763328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043189 (or 1043179 counting only the distinct ones).

The product of its digits is 217728, while the sum is 41.

The square root of 66763328 is about 8170.8829388261. The cubic root of 66763328 is about 405.6760096517.

The spelling of 66763328 in words is "sixty-six million, seven hundred sixty-three thousand, three hundred twenty-eight".