1066635401 has 8 divisors (see below), whose sum is σ = 1149128904. Its totient is φ = 984205440.

The previous prime is 1066635397. The next prime is 1066635413. The reversal of 1066635401 is 1045366601.

1066635401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 547600 + 1066087801 = 740^2 + 32651^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1066635401 - 2² = 1066635397 is a prime.

It is a super-2 number, since 2×1066635401² = 2275422157332861602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066635431) 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, 22421 + ... + 51341.

It is an arithmetic number, because the mean of its divisors is an integer number (143641113).

Almost surely, 2^1066635401 is an apocalyptic number.

It is an amenable number.

1066635401 is a deficient number, since it is larger than the sum of its proper divisors (82493503).

1066635401 is a wasteful number, since it uses less digits than its factorization.

1066635401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31771.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1066635401 is about 32659.3845777902. The cubic root of 1066635401 is about 1021.7359267708.

The spelling of 1066635401 in words is "one billion, sixty-six million, six hundred thirty-five thousand, four hundred one".