1051165666 has 4 divisors (see below), whose sum is σ = 1576748502. Its totient is φ = 525582832.

The previous prime is 1051165631. The next prime is 1051165673. The reversal of 1051165666 is 6665611501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6665611501 = 599 ⋅11127899.

It can be written as a sum of positive squares in only one way, i.e., 596580625 + 454585041 = 24425^2 + 21321^2 .

It is a super-2 number, since 2×1051165666² = 2209898514754447112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262791415 + ... + 262791418.

Almost surely, 2^1051165666 is an apocalyptic number.

1051165666 is a deficient number, since it is larger than the sum of its proper divisors (525582836).

1051165666 is an equidigital number, since it uses as much as digits as its factorization.

1051165666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525582835.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1051165666 is about 32421.6851196849. The cubic root of 1051165666 is about 1016.7723379308.

The spelling of 1051165666 in words is "one billion, fifty-one million, one hundred sixty-five thousand, six hundred sixty-six".