66607451 has 2 divisors, whose sum is σ = 66607452. Its totient is φ = 66607450.

The previous prime is 66607439. The next prime is 66607487. The reversal of 66607451 is 15470666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66607451 - 2²² = 62413147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66607421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33303725 + 33303726.

It is an arithmetic number, because the mean of its divisors is an integer number (33303726).

Almost surely, 2^66607451 is an apocalyptic number.

66607451 is a deficient number, since it is larger than the sum of its proper divisors (1).

66607451 is an equidigital number, since it uses as much as digits as its factorization.

66607451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66607451 is about 8161.3387994863. The cubic root of 66607451 is about 405.3600435933.

The spelling of 66607451 in words is "sixty-six million, six hundred seven thousand, four hundred fifty-one".