766852421 has 2 divisors, whose sum is σ = 766852422. Its totient is φ = 766852420.

The previous prime is 766852409. The next prime is 766852433. The reversal of 766852421 is 124258667.

It is a balanced prime because it is at equal distance from previous prime (766852409) and next prime (766852433).

It can be written as a sum of positive squares in only one way, i.e., 706230625 + 60621796 = 26575^2 + 7786^2 .

It is a cyclic number.

It is not a de Polignac number, because 766852421 - 2¹⁸ = 766590277 is a prime.

It is a super-2 number, since 2×766852421² = 1176125271187122482, which contains 22 as substring.

It is equal to p_39526844 and since 766852421 and 39526844 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766852451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383426210 + 383426211.

It is an arithmetic number, because the mean of its divisors is an integer number (383426211).

Almost surely, 2^766852421 is an apocalyptic number.

It is an amenable number.

766852421 is a deficient number, since it is larger than the sum of its proper divisors (1).

766852421 is an equidigital number, since it uses as much as digits as its factorization.

766852421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The square root of 766852421 is about 27692.1003356553. The cubic root of 766852421 is about 915.3150381837.

The spelling of 766852421 in words is "seven hundred sixty-six million, eight hundred fifty-two thousand, four hundred twenty-one".