7627991906 has 16 divisors (see below), whose sum is σ = 11987051328. Its totient is φ = 3633630000.

The previous prime is 7627991897. The next prime is 7627991909. The reversal of 7627991906 is 6091997267.

It is not an unprimeable number, because it can be changed into a prime (7627991909) 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, 318785 + ... + 341876.

It is an arithmetic number, because the mean of its divisors is an integer number (749190708).

Almost surely, 2^7627991906 is an apocalyptic number.

7627991906 is a deficient number, since it is larger than the sum of its proper divisors (4359059422).

7627991906 is a wasteful number, since it uses less digits than its factorization.

7627991906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660937.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The square root of 7627991906 is about 87338.3759065853. The cubic root of 7627991906 is about 1968.5059924131.

The spelling of 7627991906 in words is "seven billion, six hundred twenty-seven million, nine hundred ninety-one thousand, nine hundred six".