76663620 has 144 divisors (see below), whose sum is σ = 262080000. Its totient is φ = 17971200.

The previous prime is 76663583. The next prime is 76663637. The reversal of 76663620 is 2636667.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60756 + ... + 62004.

It is an arithmetic number, because the mean of its divisors is an integer number (1820000).

Almost surely, 2^76663620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76663620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131040000).

76663620 is an abundant number, since it is smaller than the sum of its proper divisors (185416380).

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

76663620 is a wasteful number, since it uses less digits than its factorization.

76663620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306 (or 1301 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 76663620 is about 8755.7763790540. The cubic root of 76663620 is about 424.8116720382.

The spelling of 76663620 in words is "seventy-six million, six hundred sixty-three thousand, six hundred twenty".