66632659 has 2 divisors, whose sum is σ = 66632660. Its totient is φ = 66632658.

The previous prime is 66632611. The next prime is 66632663. The reversal of 66632659 is 95623666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66632659 - 2⁹ = 66632147 is a prime.

It is a super-2 number, since 2×66632659² = 8879822490820562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66632669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33316329 + 33316330.

It is an arithmetic number, because the mean of its divisors is an integer number (33316330).

Almost surely, 2^66632659 is an apocalyptic number.

66632659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66632659 is an equidigital number, since it uses as much as digits as its factorization.

66632659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 43.

The square root of 66632659 is about 8162.8830078594. The cubic root of 66632659 is about 405.4111741452.

The spelling of 66632659 in words is "sixty-six million, six hundred thirty-two thousand, six hundred fifty-nine".