66523411 has 2 divisors, whose sum is σ = 66523412. Its totient is φ = 66523410.

The previous prime is 66523409. The next prime is 66523423. The reversal of 66523411 is 11432566.

66523411 = T₆₆₅₈ + T₆₆₅₉ + T₆₆₆₀.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66523411 - 2¹ = 66523409 is a prime.

It is a super-2 number, since 2×66523411² = 8850728422149842, which contains 22 as substring.

Together with 66523409, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66523411.

It is not a weakly prime, because it can be changed into another prime (66523711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33261705 + 33261706.

It is an arithmetic number, because the mean of its divisors is an integer number (33261706).

Almost surely, 2^66523411 is an apocalyptic number.

66523411 is the 6660-th centered triangular number.

66523411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66523411 is an equidigital number, since it uses as much as digits as its factorization.

66523411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 28.

The square root of 66523411 is about 8156.1885093468. The cubic root of 66523411 is about 405.1894881222.

Adding to 66523411 its reverse (11432566), we get a palindrome (77955977).

The spelling of 66523411 in words is "sixty-six million, five hundred twenty-three thousand, four hundred eleven".