666741087 has 24 divisors (see below), whose sum is σ = 996323328. Its totient is φ = 429210000.

The previous prime is 666741077. The next prime is 666741109. The reversal of 666741087 is 780147666.

It is not a de Polignac number, because 666741087 - 2¹⁶ = 666675551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666741067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137962 + ... + 142712.

It is an arithmetic number, because the mean of its divisors is an integer number (41513472).

Almost surely, 2^666741087 is an apocalyptic number.

666741087 is a deficient number, since it is larger than the sum of its proper divisors (329582241).

666741087 is a wasteful number, since it uses less digits than its factorization.

666741087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 666741087 is about 25821.3300780576. The cubic root of 666741087 is about 873.6129696015.

The spelling of 666741087 in words is "six hundred sixty-six million, seven hundred forty-one thousand, eighty-seven".