783665566379 has 2 divisors, whose sum is σ = 783665566380. Its totient is φ = 783665566378.

The previous prime is 783665566373. The next prime is 783665566433. The reversal of 783665566379 is 973665566387.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 783665566379 - 2¹² = 783665562283 is a prime.

It is a super-2 number, since 2×783665566379² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (783665566373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391832783189 + 391832783190.

It is an arithmetic number, because the mean of its divisors is an integer number (391832783190).

Almost surely, 2^783665566379 is an apocalyptic number.

783665566379 is a deficient number, since it is larger than the sum of its proper divisors (1).

783665566379 is an equidigital number, since it uses as much as digits as its factorization.

783665566379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1028764800, while the sum is 71.

The spelling of 783665566379 in words is "seven hundred eighty-three billion, six hundred sixty-five million, five hundred sixty-six thousand, three hundred seventy-nine".