1066533551 has 4 divisors (see below), whose sum is σ = 1103310600. Its totient is φ = 1029756504.

The previous prime is 1066533509. The next prime is 1066533571. The reversal of 1066533551 is 1553356601.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1066533551 - 2¹⁰ = 1066532527 is a prime.

It is a super-2 number, since 2×1066533551² = 2274987630817339202, 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 (1066533571) 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, 18388481 + ... + 18388538.

It is an arithmetic number, because the mean of its divisors is an integer number (275827650).

Almost surely, 2^1066533551 is an apocalyptic number.

1066533551 is a deficient number, since it is larger than the sum of its proper divisors (36777049).

1066533551 is an equidigital number, since it uses as much as digits as its factorization.

1066533551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36777048.

The product of its (nonzero) digits is 40500, while the sum is 35.

The square root of 1066533551 is about 32657.8252643987. The cubic root of 1066533551 is about 1021.7034048436.

The spelling of 1066533551 in words is "one billion, sixty-six million, five hundred thirty-three thousand, five hundred fifty-one".