6557743740 has 24 divisors (see below), whose sum is σ = 18361682640. Its totient is φ = 1748731648.

The previous prime is 6557743723. The next prime is 6557743769. The reversal of 6557743740 is 473477556.

It is a self number, because there is not a number n which added to its sum of digits gives 6557743740.

It is a congruent number.

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, 54647805 + ... + 54647924.

It is an arithmetic number, because the mean of its divisors is an integer number (765070110).

Almost surely, 2^6557743740 is an apocalyptic number.

6557743740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6557743740 is an abundant number, since it is smaller than the sum of its proper divisors (11803938900).

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

6557743740 is a wasteful number, since it uses less digits than its factorization.

6557743740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109295741 (or 109295739 counting only the distinct ones).

The product of its (nonzero) digits is 2469600, while the sum is 48.

The square root of 6557743740 is about 80979.8971350298. The cubic root of 6557743740 is about 1871.7656824203.

The spelling of 6557743740 in words is "six billion, five hundred fifty-seven million, seven hundred forty-three thousand, seven hundred forty".