1066066621 has 8 divisors (see below), whose sum is σ = 1091567840. Its totient is φ = 1040597712.

The previous prime is 1066066619. The next prime is 1066066627. The reversal of 1066066621 is 1266606601.

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 1066066621 - 2¹ = 1066066619 is a prime.

It is a super-2 number, since 2×1066066621² = 2272996080820715282, 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 (1066066627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66895 + ... + 81283.

It is an arithmetic number, because the mean of its divisors is an integer number (136445980).

Almost surely, 2^1066066621 is an apocalyptic number.

It is an amenable number.

1066066621 is a deficient number, since it is larger than the sum of its proper divisors (25501219).

1066066621 is a wasteful number, since it uses less digits than its factorization.

1066066621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16155.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1066066621 is about 32650.6756591652. The cubic root of 1066066621 is about 1021.5542819814.

The spelling of 1066066621 in words is "one billion, sixty-six million, sixty-six thousand, six hundred twenty-one".