77066393 has 2 divisors, whose sum is σ = 77066394. Its totient is φ = 77066392.

The previous prime is 77066387. The next prime is 77066401. The reversal of 77066393 is 39366077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74097664 + 2968729 = 8608^2 + 1723^2 .

It is an emirp because it is prime and its reverse (39366077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77066393 - 2⁴ = 77066377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77066393.

It is not a weakly prime, because it can be changed into another prime (77066303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38533196 + 38533197.

It is an arithmetic number, because the mean of its divisors is an integer number (38533197).

Almost surely, 2^77066393 is an apocalyptic number.

It is an amenable number.

77066393 is a deficient number, since it is larger than the sum of its proper divisors (1).

77066393 is an equidigital number, since it uses as much as digits as its factorization.

77066393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 41.

The square root of 77066393 is about 8778.7466645302. The cubic root of 77066393 is about 425.5543271961.

The spelling of 77066393 in words is "seventy-seven million, sixty-six thousand, three hundred ninety-three".