2064760661 has 4 divisors (see below), whose sum is σ = 2064883392. Its totient is φ = 2064637932.

The previous prime is 2064760657. The next prime is 2064760667. The reversal of 2064760661 is 1660674602.

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: 1660674602 = 2 ⋅830337301.

It is a cyclic number.

It is not a de Polignac number, because 2064760661 - 2² = 2064760657 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 (2064760667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31181 + ... + 71426.

It is an arithmetic number, because the mean of its divisors is an integer number (516220848).

Almost surely, 2^2064760661 is an apocalyptic number.

It is an amenable number.

2064760661 is a deficient number, since it is larger than the sum of its proper divisors (122731).

2064760661 is a wasteful number, since it uses less digits than its factorization.

2064760661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122730.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 2064760661 is about 45439.6375535721. The cubic root of 2064760661 is about 1273.3757424831.

The spelling of 2064760661 in words is "two billion, sixty-four million, seven hundred sixty thousand, six hundred sixty-one".