2666947 has 2 divisors, whose sum is σ = 2666948. Its totient is φ = 2666946.

The previous prime is 2666929. The next prime is 2666953. The reversal of 2666947 is 7496662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666947 - 2⁷ = 2666819 is a prime.

It is a super-2 number, since 2×2666947² = 14225212601618, which contains 22 as substring.

It is a Chen prime.

2666947 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2666987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333473 + 1333474.

It is an arithmetic number, because the mean of its divisors is an integer number (1333474).

2^2666947 is an apocalyptic number.

2666947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666947 is an equidigital number, since it uses as much as digits as its factorization.

2666947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 2666947 is about 1633.0789938028. The cubic root of 2666947 is about 138.6771140068.

The spelling of 2666947 in words is "two million, six hundred sixty-six thousand, nine hundred forty-seven".