766791481 has 3 divisors (see below), whose sum is σ = 766819173. Its totient is φ = 766763790.

The previous prime is 766791461. The next prime is 766791517. The reversal of 766791481 is 184197667.

The square root of 766791481 is 27691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 766791481 - 2¹³ = 766783289 is a prime.

It is a super-2 number, since 2×766791481² = 1175938350668346722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766791401) 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 in 2 ways as a sum of consecutive naturals, for example, 13846 + ... + 41536.

It is an arithmetic number, because the mean of its divisors is an integer number (255606391).

Almost surely, 2^766791481 is an apocalyptic number.

766791481 is the 27691-st square number.

766791481 is the 13846-th centered octagonal number.

It is an amenable number.

766791481 is a deficient number, since it is larger than the sum of its proper divisors (27692).

766791481 is an frugal number, since it uses more digits than its factorization.

766791481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55382 (or 27691 counting only the distinct ones).

The product of its digits is 508032, while the sum is 49.

The cubic root of 766791481 is about 915.2907915471.

Multiplying 766791481 by its sum of digits (49), we get a square (37572782569 = 193837²).

The spelling of 766791481 in words is "seven hundred sixty-six million, seven hundred ninety-one thousand, four hundred eighty-one".