7400006778 has 16 divisors (see below), whose sum is σ = 14943704256. Its totient is φ = 2442720480.

The previous prime is 7400006777. The next prime is 7400006797. The reversal of 7400006778 is 8776000047.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7400006773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5986443 + ... + 5987678.

It is an arithmetic number, because the mean of its divisors is an integer number (933981516).

Almost surely, 2^7400006778 is an apocalyptic number.

7400006778 is an abundant number, since it is smaller than the sum of its proper divisors (7543697478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7400006778 is a wasteful number, since it uses less digits than its factorization.

7400006778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11974229.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 7400006778 is about 86023.2920667420. The cubic root of 7400006778 is about 1948.6957553410.

The spelling of 7400006778 in words is "seven billion, four hundred million, six thousand, seven hundred seventy-eight".