1066657587 has 8 divisors (see below), whose sum is σ = 1497063360. Its totient is φ = 673678440.

The previous prime is 1066657583. The next prime is 1066657589. The reversal of 1066657587 is 7857566601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1066657587 - 2² = 1066657583 is a prime.

It is a super-2 number, since 2×1066657587² = 2275516815809325138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066657583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9356589 + ... + 9356702.

It is an arithmetic number, because the mean of its divisors is an integer number (187132920).

Almost surely, 2^1066657587 is an apocalyptic number.

1066657587 is a deficient number, since it is larger than the sum of its proper divisors (430405773).

1066657587 is a wasteful number, since it uses less digits than its factorization.

1066657587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18713313.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 1066657587 is about 32659.7242333734. The cubic root of 1066657587 is about 1021.7430107523.

The spelling of 1066657587 in words is "one billion, sixty-six million, six hundred fifty-seven thousand, five hundred eighty-seven".