1001554660 has 24 divisors (see below), whose sum is σ = 2226987000. Its totient is φ = 377055744.

The previous prime is 1001554637. The next prime is 1001554661. The reversal of 1001554660 is 664551001.

1001554660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 192265956 + 809288704 = 13866^2 + 28448^2 .

It is a super-2 number, since 2×1001554660² = 2006223473935431200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001554661) 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, 1472535 + ... + 1473214.

It is an arithmetic number, because the mean of its divisors is an integer number (92791125).

Almost surely, 2^1001554660 is an apocalyptic number.

1001554660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001554660 is an abundant number, since it is smaller than the sum of its proper divisors (1225432340).

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

1001554660 is a wasteful number, since it uses less digits than its factorization.

1001554660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945775 (or 2945773 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1001554660 is about 31647.3483881351. The cubic root of 1001554660 is about 1000.5179516797.

The spelling of 1001554660 in words is "one billion, one million, five hundred fifty-four thousand, six hundred sixty".