66822499 has 2 divisors, whose sum is σ = 66822500. Its totient is φ = 66822498.

The previous prime is 66822451. The next prime is 66822523. The reversal of 66822499 is 99422866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66822499 - 2⁹ = 66821987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66822419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33411249 + 33411250.

It is an arithmetic number, because the mean of its divisors is an integer number (33411250).

Almost surely, 2^66822499 is an apocalyptic number.

66822499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66822499 is an equidigital number, since it uses as much as digits as its factorization.

66822499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 66822499 is about 8174.5029818332. The cubic root of 66822499 is about 405.7958217695.

The spelling of 66822499 in words is "sixty-six million, eight hundred twenty-two thousand, four hundred ninety-nine".