6730957978 has 4 divisors (see below), whose sum is σ = 10096436970. Its totient is φ = 3365478988.

The previous prime is 6730957973. The next prime is 6730957979. The reversal of 6730957978 is 8797590376.

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., 5785579969 + 945378009 = 76063^2 + 30747^2 .

It is not an unprimeable number, because it can be changed into a prime (6730957973) by changing a digit.

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 as a sum of consecutive naturals, namely, 1682739493 + ... + 1682739496.

Almost surely, 2^6730957978 is an apocalyptic number.

6730957978 is a deficient number, since it is larger than the sum of its proper divisors (3365478992).

6730957978 is a wasteful number, since it uses less digits than its factorization.

6730957978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3365478991.

The product of its (nonzero) digits is 20003760, while the sum is 61.

The square root of 6730957978 is about 82042.4157250382. The cubic root of 6730957978 is about 1888.1027570607.

The spelling of 6730957978 in words is "six billion, seven hundred thirty million, nine hundred fifty-seven thousand, nine hundred seventy-eight".