66836831 has 2 divisors, whose sum is σ = 66836832. Its totient is φ = 66836830.

The previous prime is 66836807. The next prime is 66836839. The reversal of 66836831 is 13863866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66836831 - 2²² = 62642527 is a prime.

It is a super-2 number, since 2×66836831² = 8934323956245122, which contains 22 as substring.

It is equal to p_3942689 and since 66836831 and 3942689 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66836839) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33418415 + 33418416.

It is an arithmetic number, because the mean of its divisors is an integer number (33418416).

Almost surely, 2^66836831 is an apocalyptic number.

66836831 is a deficient number, since it is larger than the sum of its proper divisors (1).

66836831 is an equidigital number, since it uses as much as digits as its factorization.

66836831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 66836831 is about 8175.3795630539. The cubic root of 66836831 is about 405.8248312103.

The spelling of 66836831 in words is "sixty-six million, eight hundred thirty-six thousand, eight hundred thirty-one".