66420467 has 2 divisors, whose sum is σ = 66420468. Its totient is φ = 66420466.

The previous prime is 66420461. The next prime is 66420491. The reversal of 66420467 is 76402466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66420467 is a prime.

It is not a weakly prime, because it can be changed into another prime (66420461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33210233 + 33210234.

It is an arithmetic number, because the mean of its divisors is an integer number (33210234).

Almost surely, 2^66420467 is an apocalyptic number.

66420467 is a deficient number, since it is larger than the sum of its proper divisors (1).

66420467 is an equidigital number, since it uses as much as digits as its factorization.

66420467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 66420467 is about 8149.8752751192. The cubic root of 66420467 is about 404.9803719594.

The spelling of 66420467 in words is "sixty-six million, four hundred twenty thousand, four hundred sixty-seven".