766426849 has 4 divisors (see below), whose sum is σ = 770857236. Its totient is φ = 761996464.

The previous prime is 766426823. The next prime is 766426853. The reversal of 766426849 is 948624667.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 292581025 + 473845824 = 17105^2 + 21768^2 .

It is a cyclic number.

It is not a de Polignac number, because 766426849 - 2⁷ = 766426721 is a prime.

It is a super-2 number, since 2×766426849² = 1174820229736137602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766426796 and 766426805.

It is not an unprimeable number, because it can be changed into a prime (766426879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214934 + ... + 2215279.

It is an arithmetic number, because the mean of its divisors is an integer number (192714309).

Almost surely, 2^766426849 is an apocalyptic number.

It is an amenable number.

766426849 is a deficient number, since it is larger than the sum of its proper divisors (4430387).

766426849 is a wasteful number, since it uses less digits than its factorization.

766426849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430386.

The product of its digits is 3483648, while the sum is 52.

The square root of 766426849 is about 27684.4152728570. The cubic root of 766426849 is about 915.1456859410.

The spelling of 766426849 in words is "seven hundred sixty-six million, four hundred twenty-six thousand, eight hundred forty-nine".