76663332 has 18 divisors (see below), whose sum is σ = 193787958. Its totient is φ = 25554432.

The previous prime is 76663303. The next prime is 76663333. The reversal of 76663332 is 23336667.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72999936 + 3663396 = 8544^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2129537 = 76663332 / (7 + 6 + 6 + 6 + 3 + 3 + 3 + 2).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (76663333) 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, 1064733 + ... + 1064804.

Almost surely, 2^76663332 is an apocalyptic number.

It is an amenable number.

76663332 is an abundant number, since it is smaller than the sum of its proper divisors (117124626).

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

76663332 is a wasteful number, since it uses less digits than its factorization.

76663332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129547 (or 2129542 counting only the distinct ones).

The product of its digits is 81648, while the sum is 36.

The square root of 76663332 is about 8755.7599327528. The cubic root of 76663332 is about 424.8111400783.

Adding to 76663332 its reverse (23336667), we get a palindrome (99999999).

The spelling of 76663332 in words is "seventy-six million, six hundred sixty-three thousand, three hundred thirty-two".