76720055 has 8 divisors (see below), whose sum is σ = 94552512. Its totient is φ = 59717088.

The previous prime is 76720037. The next prime is 76720067. The reversal of 76720055 is 55002767.

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 76720055 - 2¹⁰ = 76719031 is a prime.

It is a Duffinian number.

It is a congruent 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, 207167 + ... + 207536.

It is an arithmetic number, because the mean of its divisors is an integer number (11819064).

Almost surely, 2^76720055 is an apocalyptic number.

76720055 is a deficient number, since it is larger than the sum of its proper divisors (17832457).

76720055 is a wasteful number, since it uses less digits than its factorization.

76720055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414745.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 76720055 is about 8758.9985158122. The cubic root of 76720055 is about 424.9158864680.

The spelling of 76720055 in words is "seventy-six million, seven hundred twenty thousand, fifty-five".