1066635049 has 4 divisors (see below), whose sum is σ = 1092650580. Its totient is φ = 1040619520.

The previous prime is 1066635023. The next prime is 1066635071. The reversal of 1066635049 is 9405366601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 589518400 + 477116649 = 24280^2 + 21843^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066635049 - 2¹³ = 1066626857 is a prime.

It is a super-2 number, since 2×1066635049² = 2275420655510464802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066635079) 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, 13007704 + ... + 13007785.

It is an arithmetic number, because the mean of its divisors is an integer number (273162645).

Almost surely, 2^1066635049 is an apocalyptic number.

It is an amenable number.

1066635049 is a deficient number, since it is larger than the sum of its proper divisors (26015531).

1066635049 is an equidigital number, since it uses as much as digits as its factorization.

1066635049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26015530.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 1066635049 is about 32659.3791888333. The cubic root of 1066635049 is about 1021.7358143766.

The spelling of 1066635049 in words is "one billion, sixty-six million, six hundred thirty-five thousand, forty-nine".