6657637740 has 48 divisors (see below), whose sum is σ = 20075340768. Its totient is φ = 1638802944.

The previous prime is 6657637739. The next prime is 6657637751. The reversal of 6657637740 is 477367566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4266937 + ... + 4268496.

It is an arithmetic number, because the mean of its divisors is an integer number (418236266).

Almost surely, 2^6657637740 is an apocalyptic number.

6657637740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6657637740 is an abundant number, since it is smaller than the sum of its proper divisors (13417703028).

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

6657637740 is a wasteful number, since it uses less digits than its factorization.

6657637740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8535458 (or 8535456 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 51.

The square root of 6657637740 is about 81594.3487013653. The cubic root of 6657637740 is about 1881.2220193702. Note that the first 3 decimals are identical.

The spelling of 6657637740 in words is "six billion, six hundred fifty-seven million, six hundred thirty-seven thousand, seven hundred forty".