766966222138 has 8 divisors (see below), whose sum is σ = 1156289178132. Its totient is φ = 381536496096.

The previous prime is 766966222129. The next prime is 766966222171. The reversal of 766966222138 is 831222669667.

It can be written as a sum of positive squares in 2 ways, for example, as 743238824769 + 23727397369 = 862113^2 + 154037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×766966222138² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973306995 + ... + 973307782.

Almost surely, 2^766966222138 is an apocalyptic number.

766966222138 is a deficient number, since it is larger than the sum of its proper divisors (389322955994).

766966222138 is a wasteful number, since it uses less digits than its factorization.

766966222138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946614976.

The product of its digits is 15676416, while the sum is 58.

The spelling of 766966222138 in words is "seven hundred sixty-six billion, nine hundred sixty-six million, two hundred twenty-two thousand, one hundred thirty-eight".