66046447 has 2 divisors, whose sum is σ = 66046448. Its totient is φ = 66046446.

The previous prime is 66046441. The next prime is 66046457. The reversal of 66046447 is 74464066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66046447 - 2³ = 66046439 is a prime.

It is a super-2 number, since 2×66046447² = 8724266322647618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66046441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33023223 + 33023224.

It is an arithmetic number, because the mean of its divisors is an integer number (33023224).

Almost surely, 2^66046447 is an apocalyptic number.

66046447 is a deficient number, since it is larger than the sum of its proper divisors (1).

66046447 is an equidigital number, since it uses as much as digits as its factorization.

66046447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 66046447 is about 8126.8965171214. The cubic root of 66046447 is about 404.2187795677.

The spelling of 66046447 in words is "sixty-six million, forty-six thousand, four hundred forty-seven".