2666949157 has 2 divisors, whose sum is σ = 2666949158. Its totient is φ = 2666949156.

The previous prime is 2666949151. The next prime is 2666949191. The reversal of 2666949157 is 7519496662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1374259041 + 1292690116 = 37071^2 + 35954^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666949157 - 2¹¹ = 2666947109 is a prime.

It is a super-2 number, since 2×2666949157² = 14225235612046021298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666949098 and 2666949107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666949151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333474578 + 1333474579.

It is an arithmetic number, because the mean of its divisors is an integer number (1333474579).

Almost surely, 2^2666949157 is an apocalyptic number.

It is an amenable number.

2666949157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666949157 is an equidigital number, since it uses as much as digits as its factorization.

2666949157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 55.

The square root of 2666949157 is about 51642.5130778896. The cubic root of 2666949157 is about 1386.7715139367.

The spelling of 2666949157 in words is "two billion, six hundred sixty-six million, nine hundred forty-nine thousand, one hundred fifty-seven".