766451138 has 4 divisors (see below), whose sum is σ = 1149676710. Its totient is φ = 383225568.

The previous prime is 766451131. The next prime is 766451173. The reversal of 766451138 is 831154667.

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

It can be written as a sum of positive squares in only one way, i.e., 391525369 + 374925769 = 19787^2 + 19363^2 .

It is a junction number, because it is equal to n+sod(n) for n = 766451095 and 766451104.

It is not an unprimeable number, because it can be changed into a prime (766451131) 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, 191612783 + ... + 191612786.

Almost surely, 2^766451138 is an apocalyptic number.

766451138 is a deficient number, since it is larger than the sum of its proper divisors (383225572).

766451138 is a wasteful number, since it uses less digits than its factorization.

766451138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383225571.

The product of its digits is 120960, while the sum is 41.

The square root of 766451138 is about 27684.8539457950. The cubic root of 766451138 is about 915.1553531993.

The spelling of 766451138 in words is "seven hundred sixty-six million, four hundred fifty-one thousand, one hundred thirty-eight".