76678978 has 4 divisors (see below), whose sum is σ = 115018470. Its totient is φ = 38339488.

The previous prime is 76678967. The next prime is 76678991. The reversal of 76678978 is 87987667.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41951529 + 34727449 = 6477^2 + 5893^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19169743 + ... + 19169746.

Almost surely, 2^76678978 is an apocalyptic number.

76678978 is a deficient number, since it is larger than the sum of its proper divisors (38339492).

76678978 is a wasteful number, since it uses less digits than its factorization.

76678978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38339491.

The product of its digits is 7112448, while the sum is 58.

The square root of 76678978 is about 8756.6533561630. The cubic root of 76678978 is about 424.8400376091.

The spelling of 76678978 in words is "seventy-six million, six hundred seventy-eight thousand, nine hundred seventy-eight".