66794347 has 2 divisors, whose sum is σ = 66794348. Its totient is φ = 66794346.

The previous prime is 66794317. The next prime is 66794359. The reversal of 66794347 is 74349766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66794347 - 2¹⁹ = 66270059 is a prime.

It is a super-2 number, since 2×66794347² = 8922969582312818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66794297 and 66794306.

It is not a weakly prime, because it can be changed into another prime (66794317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33397173 + 33397174.

It is an arithmetic number, because the mean of its divisors is an integer number (33397174).

Almost surely, 2^66794347 is an apocalyptic number.

66794347 is a deficient number, since it is larger than the sum of its proper divisors (1).

66794347 is an equidigital number, since it uses as much as digits as its factorization.

66794347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 46.

The square root of 66794347 is about 8172.7808608821. The cubic root of 66794347 is about 405.7388271504.

It can be divided in two parts, 6679 and 4347, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 66794347 in words is "sixty-six million, seven hundred ninety-four thousand, three hundred forty-seven".