76644505 has 8 divisors (see below), whose sum is σ = 105112512. Its totient is φ = 52556208.

The previous prime is 76644497. The next prime is 76644511. The reversal of 76644505 is 50544667.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76644505 - 2³ = 76644497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094887 + ... + 1094956.

It is an arithmetic number, because the mean of its divisors is an integer number (13139064).

Almost surely, 2^76644505 is an apocalyptic number.

It is an amenable number.

76644505 is a deficient number, since it is larger than the sum of its proper divisors (28468007).

76644505 is a wasteful number, since it uses less digits than its factorization.

76644505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189855.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 76644505 is about 8754.6847458946. The cubic root of 76644505 is about 424.7763621564.

The spelling of 76644505 in words is "seventy-six million, six hundred forty-four thousand, five hundred five".