78466337 has 2 divisors, whose sum is σ = 78466338. Its totient is φ = 78466336.

The previous prime is 78466309. The next prime is 78466351. The reversal of 78466337 is 73366487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 13808656 = 8041^2 + 3716^2 .

It is an emirp because it is prime and its reverse (73366487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78466337 is a prime.

It is not a weakly prime, because it can be changed into another prime (78466387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39233168 + 39233169.

It is an arithmetic number, because the mean of its divisors is an integer number (39233169).

Almost surely, 2^78466337 is an apocalyptic number.

It is an amenable number.

78466337 is a deficient number, since it is larger than the sum of its proper divisors (1).

78466337 is an equidigital number, since it uses as much as digits as its factorization.

78466337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 44.

The square root of 78466337 is about 8858.1226566355. The cubic root of 78466337 is about 428.1156720720.

The spelling of 78466337 in words is "seventy-eight million, four hundred sixty-six thousand, three hundred thirty-seven".