66453769 has 2 divisors, whose sum is σ = 66453770. Its totient is φ = 66453768.

The previous prime is 66453767. The next prime is 66453823. The reversal of 66453769 is 96735466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 15116544 = 7165^2 + 3888^2 .

It is a cyclic number.

It is not a de Polignac number, because 66453769 - 2¹ = 66453767 is a prime.

It is a super-2 number, since 2×66453769² = 8832206828610722, which contains 22 as substring.

Together with 66453767, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66453763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33226884 + 33226885.

It is an arithmetic number, because the mean of its divisors is an integer number (33226885).

Almost surely, 2^66453769 is an apocalyptic number.

It is an amenable number.

66453769 is a deficient number, since it is larger than the sum of its proper divisors (1).

66453769 is an equidigital number, since it uses as much as digits as its factorization.

66453769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 46.

The square root of 66453769 is about 8151.9181178420. The cubic root of 66453769 is about 405.0480438864.

The spelling of 66453769 in words is "sixty-six million, four hundred fifty-three thousand, seven hundred sixty-nine".