5555661672 has 64 divisors (see below), whose sum is σ = 15166978560. Its totient is φ = 1681848000.

The previous prime is 5555661667. The next prime is 5555661673. The reversal of 5555661672 is 2761665555.

It is a happy number.

It is a super-2 number, since 2×5555661672² = 61730753227459671168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5555661673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267453 + ... + 287475.

It is an arithmetic number, because the mean of its divisors is an integer number (236984040).

Almost surely, 2^5555661672 is an apocalyptic number.

It is an amenable number.

5555661672 is an abundant number, since it is smaller than the sum of its proper divisors (9611316888).

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

5555661672 is a wasteful number, since it uses less digits than its factorization.

5555661672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21094 (or 21090 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 48.

The square root of 5555661672 is about 74536.3110973437. The cubic root of 5555661672 is about 1771.1088917875.

The spelling of 5555661672 in words is "five billion, five hundred fifty-five million, six hundred sixty-one thousand, six hundred seventy-two".