6467442778 has 16 divisors (see below), whose sum is σ = 9932319936. Its totient is φ = 3156753600.

The previous prime is 6467442767. The next prime is 6467442781. The reversal of 6467442778 is 8772447646.

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, 141003 + ... + 181153.

It is an arithmetic number, because the mean of its divisors is an integer number (620769996).

Almost surely, 2^6467442778 is an apocalyptic number.

6467442778 is a deficient number, since it is larger than the sum of its proper divisors (3464877158).

6467442778 is a wasteful number, since it uses less digits than its factorization.

6467442778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42069.

The product of its digits is 12644352, while the sum is 55.

The square root of 6467442778 is about 80420.4126947879. The cubic root of 6467442778 is about 1863.1344591504.

The spelling of 6467442778 in words is "six billion, four hundred sixty-seven million, four hundred forty-two thousand, seven hundred seventy-eight".