6556269981 has 8 divisors (see below), whose sum is σ = 8742090240. Its totient is φ = 4370648192.

The previous prime is 6556269977. The next prime is 6556269983. The reversal of 6556269981 is 1899626556.

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

It is a cyclic number.

It is not a de Polignac number, because 6556269981 - 2² = 6556269977 is a prime.

It is a super-2 number, since 2×6556269981² = 85969352127523480722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556269983) 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, 65860 + ... + 132098.

It is an arithmetic number, because the mean of its divisors is an integer number (1092761280).

Almost surely, 2^6556269981 is an apocalyptic number.

It is an amenable number.

6556269981 is a deficient number, since it is larger than the sum of its proper divisors (2185820259).

6556269981 is a wasteful number, since it uses less digits than its factorization.

6556269981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99235.

The product of its digits is 6998400, while the sum is 57.

The square root of 6556269981 is about 80970.7970875920. The cubic root of 6556269981 is about 1871.6254544037.

The spelling of 6556269981 in words is "six billion, five hundred fifty-six million, two hundred sixty-nine thousand, nine hundred eighty-one".