2666415247 has 2 divisors, whose sum is σ = 2666415248. Its totient is φ = 2666415246.

The previous prime is 2666415223. The next prime is 2666415263. The reversal of 2666415247 is 7425146662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666415247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666415287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333207623 + 1333207624.

It is an arithmetic number, because the mean of its divisors is an integer number (1333207624).

Almost surely, 2^2666415247 is an apocalyptic number.

2666415247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666415247 is an equidigital number, since it uses as much as digits as its factorization.

2666415247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The square root of 2666415247 is about 51637.3435315954. The cubic root of 2666415247 is about 1386.6789661664.

It can be divided in two parts, 2666415 and 247, that added together give a palindrome (2666662).

The spelling of 2666415247 in words is "two billion, six hundred sixty-six million, four hundred fifteen thousand, two hundred forty-seven".