2067661121 has 4 divisors (see below), whose sum is σ = 2123543892. Its totient is φ = 2011778352.

The previous prime is 2067661103. The next prime is 2067661139. The reversal of 2067661121 is 1211667602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211667602 = 2 ⋅605833801.

It is an interprime number because it is at equal distance from previous prime (2067661103) and next prime (2067661139).

It can be written as a sum of positive squares in 2 ways, for example, as 1799880625 + 267780496 = 42425^2 + 16364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2067661121 is a prime.

It is a super-2 number, since 2×2067661121² = 8550445022589953282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2067661151) 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, 27941330 + ... + 27941403.

It is an arithmetic number, because the mean of its divisors is an integer number (530885973).

Almost surely, 2^2067661121 is an apocalyptic number.

It is an amenable number.

2067661121 is a deficient number, since it is larger than the sum of its proper divisors (55882771).

2067661121 is an equidigital number, since it uses as much as digits as its factorization.

2067661121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55882770.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2067661121 is about 45471.5418806092. The cubic root of 2067661121 is about 1273.9717191192.

The spelling of 2067661121 in words is "two billion, sixty-seven million, six hundred sixty-one thousand, one hundred twenty-one".