6555499776 has 360 divisors, whose sum is σ = 23525458880. Its totient is φ = 1773674496.

The previous prime is 6555499759. The next prime is 6555499777. The reversal of 6555499776 is 6779945556.

6555499776 is a `hidden beast` number, since 6 + 5 + 554 + 9 + 9 + 7 + 76 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555499777) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2756700 + ... + 2759076.

Almost surely, 2^6555499776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6555499776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11762729440).

6555499776 is an abundant number, since it is smaller than the sum of its proper divisors (16969959104).

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

6555499776 is a wasteful number, since it uses less digits than its factorization.

6555499776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431 (or 2408 counting only the distinct ones).

The product of its digits is 71442000, while the sum is 63.

The square root of 6555499776 is about 80966.0408813473. The cubic root of 6555499776 is about 1871.5521611165.

The spelling of 6555499776 in words is "six billion, five hundred fifty-five million, four hundred ninety-nine thousand, seven hundred seventy-six".