66617367 has 4 divisors (see below), whose sum is σ = 88823160. Its totient is φ = 44411576.

The previous prime is 66617311. The next prime is 66617371. The reversal of 66617367 is 76371666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66617367 - 2¹¹ = 66615319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66617387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11102892 + ... + 11102897.

It is an arithmetic number, because the mean of its divisors is an integer number (22205790).

Almost surely, 2^66617367 is an apocalyptic number.

66617367 is a deficient number, since it is larger than the sum of its proper divisors (22205793).

66617367 is a wasteful number, since it uses less digits than its factorization.

66617367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22205792.

The product of its digits is 190512, while the sum is 42.

The square root of 66617367 is about 8161.9462752459. The cubic root of 66617367 is about 405.3801582136.

It can be divided in two parts, 6661 and 7367, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 66617367 in words is "sixty-six million, six hundred seventeen thousand, three hundred sixty-seven".