6556680490 has 8 divisors (see below), whose sum is σ = 11802024900. Its totient is φ = 2622672192.

The previous prime is 6556680469. The next prime is 6556680491. The reversal of 6556680490 is 940866556.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6250325481 + 306355009 = 79059^2 + 17503^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6556680491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327834015 + ... + 327834034.

Almost surely, 2^6556680490 is an apocalyptic number.

6556680490 is a deficient number, since it is larger than the sum of its proper divisors (5245344410).

6556680490 is a wasteful number, since it uses less digits than its factorization.

6556680490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655668056.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The square root of 6556680490 is about 80973.3319680004. The cubic root of 6556680490 is about 1871.6645164039.

The spelling of 6556680490 in words is "six billion, five hundred fifty-six million, six hundred eighty thousand, four hundred ninety".