66424507 has 2 divisors, whose sum is σ = 66424508. Its totient is φ = 66424506.

The previous prime is 66424459. The next prime is 66424511. The reversal of 66424507 is 70542466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66424507 is a prime.

It is not a weakly prime, because it can be changed into another prime (66424307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33212253 + 33212254.

It is an arithmetic number, because the mean of its divisors is an integer number (33212254).

Almost surely, 2^66424507 is an apocalyptic number.

66424507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66424507 is an equidigital number, since it uses as much as digits as its factorization.

66424507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 66424507 is about 8150.1231279043. The cubic root of 66424507 is about 404.9885827193.

The spelling of 66424507 in words is "sixty-six million, four hundred twenty-four thousand, five hundred seven".