613666427 has 24 divisors (see below), whose sum is σ = 737372160. Its totient is φ = 505462320.

The previous prime is 613666379. The next prime is 613666439. The reversal of 613666427 is 724666316.

It is not a de Polignac number, because 613666427 - 2⁶ = 613666363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613666327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87974 + ... + 94692.

It is an arithmetic number, because the mean of its divisors is an integer number (30723840).

Almost surely, 2^613666427 is an apocalyptic number.

613666427 is a deficient number, since it is larger than the sum of its proper divisors (123705733).

613666427 is a wasteful number, since it uses less digits than its factorization.

613666427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791 (or 6772 counting only the distinct ones).

The product of its digits is 217728, while the sum is 41.

The square root of 613666427 is about 24772.2915169348. The cubic root of 613666427 is about 849.7883796135.

The spelling of 613666427 in words is "six hundred thirteen million, six hundred sixty-six thousand, four hundred twenty-seven".