1066003521 has 8 divisors (see below), whose sum is σ = 1550550624. Its totient is φ = 646062720.

The previous prime is 1066003511. The next prime is 1066003529. The reversal of 1066003521 is 1253006601.

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

It is not a de Polignac number, because 1066003521 - 2⁶ = 1066003457 is a prime.

It is a super-2 number, since 2×1066003521² = 2272727013568794882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066003491 and 1066003500.

It is not an unprimeable number, because it can be changed into a prime (1066003529) 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, 16151536 + ... + 16151601.

It is an arithmetic number, because the mean of its divisors is an integer number (193818828).

Almost surely, 2^1066003521 is an apocalyptic number.

1066003521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1066003521 is a deficient number, since it is larger than the sum of its proper divisors (484547103).

1066003521 is a wasteful number, since it uses less digits than its factorization.

1066003521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32303151.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1066003521 is about 32649.7093555211. The cubic root of 1066003521 is about 1021.5341264721.

The spelling of 1066003521 in words is "one billion, sixty-six million, three thousand, five hundred twenty-one".