1041600661 has 4 divisors (see below), whose sum is σ = 1046888172. Its totient is φ = 1036313152.

The previous prime is 1041600529. The next prime is 1041600667. The reversal of 1041600661 is 1660061401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1660061401 = 1697 ⋅978233.

It can be written as a sum of positive squares in 2 ways, for example, as 470629636 + 570971025 = 21694^2 + 23895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1041600661 - 2²⁷ = 907382933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1041600667) 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, 2643460 + ... + 2643853.

It is an arithmetic number, because the mean of its divisors is an integer number (261722043).

Almost surely, 2^1041600661 is an apocalyptic number.

It is an amenable number.

1041600661 is a deficient number, since it is larger than the sum of its proper divisors (5287511).

1041600661 is an equidigital number, since it uses as much as digits as its factorization.

1041600661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287510.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1041600661 is about 32273.8386468049. The cubic root of 1041600661 is about 1013.6789209541.

The spelling of 1041600661 in words is "one billion, forty-one million, six hundred thousand, six hundred sixty-one".