76668930 has 112 divisors (see below), whose sum is σ = 223103160. Its totient is φ = 18849024.

The previous prime is 76668923. The next prime is 76668931. The reversal of 76668930 is 3986667.

It can be written as a sum of positive squares in 4 ways, for example, as 62583921 + 14085009 = 7911^2 + 3753^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76668931) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 94366 + ... + 95174.

Almost surely, 2^76668930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76668930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111551580).

76668930 is an abundant number, since it is smaller than the sum of its proper divisors (146434230).

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

76668930 is a wasteful number, since it uses less digits than its factorization.

76668930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 76668930 is about 8756.0796021964. The cubic root of 76668930 is about 424.8214798102.

It can be divided in two parts, 766 and 68930, that added together give a palindrome (69696).

The spelling of 76668930 in words is "seventy-six million, six hundred sixty-eight thousand, nine hundred thirty".