76530778 has 8 divisors (see below), whose sum is σ = 114847668. Its totient is φ = 38248224.

The previous prime is 76530737. The next prime is 76530799. The reversal of 76530778 is 87703567.

It can be written as a sum of positive squares in 2 ways, for example, as 74874409 + 1656369 = 8653^2 + 1287^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001 + ... + 12532.

Almost surely, 2^76530778 is an apocalyptic number.

76530778 is a deficient number, since it is larger than the sum of its proper divisors (38316890).

76530778 is a wasteful number, since it uses less digits than its factorization.

76530778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17168.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 76530778 is about 8748.1871264851. The cubic root of 76530778 is about 424.5661602863.

The spelling of 76530778 in words is "seventy-six million, five hundred thirty thousand, seven hundred seventy-eight".