766809198 has 12 divisors (see below), whose sum is σ = 1661419968. Its totient is φ = 255603060.

The previous prime is 766809193. The next prime is 766809203. The reversal of 766809198 is 891908667.

It is an interprime number because it is at equal distance from previous prime (766809193) and next prime (766809203).

It is a super-2 number, since 2×766809198² = 1175992692274806408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766809193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21300238 + ... + 21300273.

It is an arithmetic number, because the mean of its divisors is an integer number (138451664).

Almost surely, 2^766809198 is an apocalyptic number.

766809198 is an abundant number, since it is smaller than the sum of its proper divisors (894610770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766809198 is a wasteful number, since it uses less digits than its factorization.

766809198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42600519 (or 42600516 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 766809198 is about 27691.3199035366. The cubic root of 766809198 is about 915.2978408699.

The spelling of 766809198 in words is "seven hundred sixty-six million, eight hundred nine thousand, one hundred ninety-eight".