2061430661 has 4 divisors (see below), whose sum is σ = 2087524800. Its totient is φ = 2035336524.

The previous prime is 2061430633. The next prime is 2061430663. The reversal of 2061430661 is 1660341602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1660341602 = 2 ⋅830170801.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061430661 is a prime.

It is a super-3 number, since 3×2061430661³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061430663) 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, 13046951 + ... + 13047108.

It is an arithmetic number, because the mean of its divisors is an integer number (521881200).

Almost surely, 2^2061430661 is an apocalyptic number.

It is an amenable number.

2061430661 is a deficient number, since it is larger than the sum of its proper divisors (26094139).

2061430661 is an equidigital number, since it uses as much as digits as its factorization.

2061430661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26094138.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2061430661 is about 45402.9807501666. The cubic root of 2061430661 is about 1272.6908167961.

The spelling of 2061430661 in words is "two billion, sixty-one million, four hundred thirty thousand, six hundred sixty-one".