66613367 has 2 divisors, whose sum is σ = 66613368. Its totient is φ = 66613366.

The previous prime is 66613307. The next prime is 66613409. The reversal of 66613367 is 76331666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66613367 - 2⁸ = 66613111 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66613367.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66613307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33306683 + 33306684.

It is an arithmetic number, because the mean of its divisors is an integer number (33306684).

Almost surely, 2^66613367 is an apocalyptic number.

66613367 is a deficient number, since it is larger than the sum of its proper divisors (1).

66613367 is an equidigital number, since it uses as much as digits as its factorization.

66613367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 66613367 is about 8161.7012319736. The cubic root of 66613367 is about 405.3720444480.

The spelling of 66613367 in words is "sixty-six million, six hundred thirteen thousand, three hundred sixty-seven".