2061664967 has 4 divisors (see below), whose sum is σ = 2100564360. Its totient is φ = 2022765576.

The previous prime is 2061664963. The next prime is 2061664993. The reversal of 2061664967 is 7694661602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7694661602 = 2 ⋅3847330801.

It is a cyclic number.

It is not a de Polignac number, because 2061664967 - 2² = 2061664963 is a prime.

It is a super-2 number, since 2×2061664967² = 8500924872310222178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061664963) 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, 19449617 + ... + 19449722.

It is an arithmetic number, because the mean of its divisors is an integer number (525141090).

Almost surely, 2^2061664967 is an apocalyptic number.

2061664967 is a deficient number, since it is larger than the sum of its proper divisors (38899393).

2061664967 is an equidigital number, since it uses as much as digits as its factorization.

2061664967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38899392.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 2061664967 is about 45405.5609699957. The cubic root of 2061664967 is about 1272.7390337622.

The spelling of 2061664967 in words is "two billion, sixty-one million, six hundred sixty-four thousand, nine hundred sixty-seven".