2000780669 has 4 divisors (see below), whose sum is σ = 2047310496. Its totient is φ = 1954250844.

The previous prime is 2000780657. The next prime is 2000780699. The reversal of 2000780669 is 9660870002.

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.

It is a cyclic number.

It is not a de Polignac number, because 2000780669 - 2⁸ = 2000780413 is a prime.

It is a super-2 number, since 2×2000780669² = 8006246570888175122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000780629) 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, 23264849 + ... + 23264934.

It is an arithmetic number, because the mean of its divisors is an integer number (511827624).

Almost surely, 2^2000780669 is an apocalyptic number.

It is an amenable number.

2000780669 is a deficient number, since it is larger than the sum of its proper divisors (46529827).

2000780669 is an equidigital number, since it uses as much as digits as its factorization.

2000780669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46529826.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2000780669 is about 44730.0868431976. The cubic root of 2000780669 is about 1260.0849587880.

The spelling of 2000780669 in words is "two billion, seven hundred eighty thousand, six hundred sixty-nine".