66676361 has 4 divisors (see below), whose sum is σ = 66855492. Its totient is φ = 66497232.

The previous prime is 66676303. The next prime is 66676367. The reversal of 66676361 is 16367666.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39438400 + 27237961 = 6280^2 + 5219^2 .

It is a cyclic number.

It is not a de Polignac number, because 66676361 - 2⁶ = 66676297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66676367) 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, 89006 + ... + 89751.

It is an arithmetic number, because the mean of its divisors is an integer number (16713873).

Almost surely, 2^66676361 is an apocalyptic number.

It is an amenable number.

66676361 is a deficient number, since it is larger than the sum of its proper divisors (179131).

66676361 is a wasteful number, since it uses less digits than its factorization.

66676361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179130.

The product of its digits is 163296, while the sum is 41.

The square root of 66676361 is about 8165.5594419488. The cubic root of 66676361 is about 405.4997863835.

The spelling of 66676361 in words is "sixty-six million, six hundred seventy-six thousand, three hundred sixty-one".