1066430261 has 8 divisors (see below), whose sum is σ = 1148792064. Its totient is φ = 984115440.

The previous prime is 1066430221. The next prime is 1066430273. The reversal of 1066430261 is 1620346601.

It is a happy number.

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 1066430261 - 2¹⁴ = 1066413877 is a prime.

It is a super-2 number, since 2×1066430261² = 2274547003153056242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066430201) 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, 45920 + ... + 65126.

It is an arithmetic number, because the mean of its divisors is an integer number (143599008).

Almost surely, 2^1066430261 is an apocalyptic number.

It is an amenable number.

1066430261 is a deficient number, since it is larger than the sum of its proper divisors (82361803).

1066430261 is a wasteful number, since it uses less digits than its factorization.

1066430261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23491.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1066430261 is about 32656.2438287076. The cubic root of 1066430261 is about 1021.6704209925.

Adding to 1066430261 its reverse (1620346601), we get a palindrome (2686776862).

The spelling of 1066430261 in words is "one billion, sixty-six million, four hundred thirty thousand, two hundred sixty-one".