66469451 has 2 divisors, whose sum is σ = 66469452. Its totient is φ = 66469450.

The previous prime is 66469433. The next prime is 66469457. The reversal of 66469451 is 15496466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66469451 - 2¹⁴ = 66453067 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66469399 and 66469408.

It is not a weakly prime, because it can be changed into another prime (66469457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33234725 + 33234726.

It is an arithmetic number, because the mean of its divisors is an integer number (33234726).

Almost surely, 2^66469451 is an apocalyptic number.

66469451 is a deficient number, since it is larger than the sum of its proper divisors (1).

66469451 is an equidigital number, since it uses as much as digits as its factorization.

66469451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 66469451 is about 8152.8799206170. The cubic root of 66469451 is about 405.0799029464.

The spelling of 66469451 in words is "sixty-six million, four hundred sixty-nine thousand, four hundred fifty-one".