1066834987 has 4 divisors (see below), whose sum is σ = 1068931440. Its totient is φ = 1064738536.

The previous prime is 1066834981. The next prime is 1066835101. The reversal of 1066834987 is 7894386601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7894386601 = 1993 ⋅3961057.

It is a cyclic number.

It is not a de Polignac number, because 1066834987 - 2¹¹ = 1066832939 is a prime.

It is a super-2 number, since 2×1066834987² = 2276273778974580338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066834981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047463 + ... + 1048480.

It is an arithmetic number, because the mean of its divisors is an integer number (267232860).

Almost surely, 2^1066834987 is an apocalyptic number.

1066834987 is a deficient number, since it is larger than the sum of its proper divisors (2096453).

1066834987 is an equidigital number, since it uses as much as digits as its factorization.

1066834987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096452.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 1066834987 is about 32662.4400037719. The cubic root of 1066834987 is about 1021.7996509727.

The spelling of 1066834987 in words is "one billion, sixty-six million, eight hundred thirty-four thousand, nine hundred eighty-seven".