5666620403 has 4 divisors (see below), whose sum is σ = 5675219880. Its totient is φ = 5658020928.

The previous prime is 5666620361. The next prime is 5666620433. The reversal of 5666620403 is 3040266665.

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 5666620403 - 2¹⁶ = 5666554867 is a prime.

It is a super-2 number, since 2×5666620403² = 64221173583391764818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5666620433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298750 + ... + 4300067.

It is an arithmetic number, because the mean of its divisors is an integer number (1418804970).

Almost surely, 2^5666620403 is an apocalyptic number.

5666620403 is a deficient number, since it is larger than the sum of its proper divisors (8599477).

5666620403 is an equidigital number, since it uses as much as digits as its factorization.

5666620403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8599476.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 5666620403 is about 75276.9579818420. The cubic root of 5666620403 is about 1782.8222286283.

The spelling of 5666620403 in words is "five billion, six hundred sixty-six million, six hundred twenty thousand, four hundred three".