2669940181 has 2 divisors, whose sum is σ = 2669940182. Its totient is φ = 2669940180.

The previous prime is 2669940149. The next prime is 2669940197. The reversal of 2669940181 is 1810499662.

It is a happy number.

2669940181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2503401156 + 166539025 = 50034^2 + 12905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2669940181 - 2⁵ = 2669940149 is a prime.

It is a super-2 number, since 2×2669940181² = 14257161140236625522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2669941181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334970090 + 1334970091.

It is an arithmetic number, because the mean of its divisors is an integer number (1334970091).

Almost surely, 2^2669940181 is an apocalyptic number.

It is an amenable number.

2669940181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2669940181 is an equidigital number, since it uses as much as digits as its factorization.

2669940181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 2669940181 is about 51671.4638944940. The cubic root of 2669940181 is about 1387.2897486898.

The spelling of 2669940181 in words is "two billion, six hundred sixty-nine million, nine hundred forty thousand, one hundred eighty-one".