766138355 has 4 divisors (see below), whose sum is σ = 919366032. Its totient is φ = 612910680.

The previous prime is 766138339. The next prime is 766138357. The reversal of 766138355 is 553831667.

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

It is not a de Polignac number, because 766138355 - 2⁴ = 766138339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766138357) 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, 76613831 + ... + 76613840.

It is an arithmetic number, because the mean of its divisors is an integer number (229841508).

Almost surely, 2^766138355 is an apocalyptic number.

766138355 is a deficient number, since it is larger than the sum of its proper divisors (153227677).

766138355 is a wasteful number, since it uses less digits than its factorization.

766138355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153227676.

The product of its digits is 453600, while the sum is 44.

The square root of 766138355 is about 27679.2043780164. The cubic root of 766138355 is about 915.0308469002.

The spelling of 766138355 in words is "seven hundred sixty-six million, one hundred thirty-eight thousand, three hundred fifty-five".