7748668478 has 4 divisors (see below), whose sum is σ = 11623002720. Its totient is φ = 3874334238.

The previous prime is 7748668453. The next prime is 7748668517. The reversal of 7748668478 is 8748668477.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1937167118 + ... + 1937167121.

It is an arithmetic number, because the mean of its divisors is an integer number (2905750680).

Almost surely, 2^7748668478 is an apocalyptic number.

7748668478 is a deficient number, since it is larger than the sum of its proper divisors (3874334242).

7748668478 is a wasteful number, since it uses less digits than its factorization.

7748668478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874334241.

The product of its digits is 101154816, while the sum is 65.

The square root of 7748668478 is about 88026.5214466640. The cubic root of 7748668478 is about 1978.8324645909.

Subtracting 7748668478 from its reverse (8748668477), we obtain a palindrome (999999999).

The spelling of 7748668478 in words is "seven billion, seven hundred forty-eight million, six hundred sixty-eight thousand, four hundred seventy-eight".