1010043661 has 16 divisors (see below), whose sum is σ = 1167989760. Its totient is φ = 863239680.

The previous prime is 1010043653. The next prime is 1010043703. The reversal of 1010043661 is 1663400101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1010043661 - 2³ = 1010043653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010043061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200785 + ... + 205753.

It is an arithmetic number, because the mean of its divisors is an integer number (72999360).

Almost surely, 2^1010043661 is an apocalyptic number.

1010043661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1010043661 is a deficient number, since it is larger than the sum of its proper divisors (157946099).

1010043661 is a wasteful number, since it uses less digits than its factorization.

1010043661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6084.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1010043661 is about 31781.1840717114. The cubic root of 1010043661 is about 1003.3367407774.

Adding to 1010043661 its reverse (1663400101), we get a palindrome (2673443762).

The spelling of 1010043661 in words is "one billion, ten million, forty-three thousand, six hundred sixty-one".