1066620621 has 8 divisors (see below), whose sum is σ = 1551448224. Its totient is φ = 646436720.

The previous prime is 1066620587. The next prime is 1066620623. The reversal of 1066620621 is 1260266601.

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 1066620621 - 2¹⁰ = 1066619597 is a prime.

It is a super-2 number, since 2×1066620621² = 2275359098284851282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066620623) 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, 16160886 + ... + 16160951.

It is an arithmetic number, because the mean of its divisors is an integer number (193931028).

Almost surely, 2^1066620621 is an apocalyptic number.

1066620621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1066620621 is a deficient number, since it is larger than the sum of its proper divisors (484827603).

1066620621 is a wasteful number, since it uses less digits than its factorization.

1066620621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321851.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1066620621 is about 32659.1583020751. The cubic root of 1066620621 is about 1021.7312074679.

The spelling of 1066620621 in words is "one billion, sixty-six million, six hundred twenty thousand, six hundred twenty-one".