2081377667 has 4 divisors (see below), whose sum is σ = 2190923880. Its totient is φ = 1971831456.

The previous prime is 2081377651. The next prime is 2081377691. The reversal of 2081377667 is 7667731802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7667731802 = 2 ⋅3833865901.

It is a cyclic number.

It is not a de Polignac number, because 2081377667 - 2⁴ = 2081377651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081373667) 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, 54773078 + ... + 54773115.

It is an arithmetic number, because the mean of its divisors is an integer number (547730970).

Almost surely, 2^2081377667 is an apocalyptic number.

2081377667 is a deficient number, since it is larger than the sum of its proper divisors (109546213).

2081377667 is a wasteful number, since it uses less digits than its factorization.

2081377667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109546212.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 2081377667 is about 45622.1181774805. The cubic root of 2081377667 is about 1276.7826233923.

The spelling of 2081377667 in words is "two billion, eighty-one million, three hundred seventy-seven thousand, six hundred sixty-seven".