66976313 has 4 divisors (see below), whose sum is σ = 67026468. Its totient is φ = 66926160.

The previous prime is 66976307. The next prime is 66976319. The reversal of 66976313 is 31367966.

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

It is an interprime number because it is at equal distance from previous prime (66976307) and next prime (66976319).

It can be written as a sum of positive squares in 2 ways, for example, as 36096064 + 30880249 = 6008^2 + 5557^2 .

It is a cyclic number.

It is not a de Polignac number, because 66976313 - 2⁴ = 66976297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66976319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23018 + ... + 25763.

It is an arithmetic number, because the mean of its divisors is an integer number (16756617).

Almost surely, 2^66976313 is an apocalyptic number.

It is an amenable number.

66976313 is a deficient number, since it is larger than the sum of its proper divisors (50155).

66976313 is a wasteful number, since it uses less digits than its factorization.

66976313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50154.

The product of its digits is 122472, while the sum is 41.

The square root of 66976313 is about 8183.9057301511. The cubic root of 66976313 is about 406.1069407761.

The spelling of 66976313 in words is "sixty-six million, nine hundred seventy-six thousand, three hundred thirteen".