766606698 has 144 divisors (see below), whose sum is σ = 2043516384. Its totient is φ = 204747840.

The previous prime is 766606693. The next prime is 766606717. The reversal of 766606698 is 896606667.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766606693) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1361365 + ... + 1361927.

It is an arithmetic number, because the mean of its divisors is an integer number (14191086).

Almost surely, 2^766606698 is an apocalyptic number.

766606698 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 766606698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021758192).

766606698 is an abundant number, since it is smaller than the sum of its proper divisors (1276909686).

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

766606698 is a wasteful number, since it uses less digits than its factorization.

766606698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The square root of 766606698 is about 27687.6632816856. The cubic root of 766606698 is about 915.2172627498.

The spelling of 766606698 in words is "seven hundred sixty-six million, six hundred six thousand, six hundred ninety-eight".