1066420031 has 4 divisors (see below), whose sum is σ = 1095242232. Its totient is φ = 1037597832.

The previous prime is 1066420021. The next prime is 1066420051. The reversal of 1066420031 is 1300246601.

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 1066420031 - 2²² = 1062225727 is a prime.

It is a super-2 number, since 2×1066420031² = 2274503365036081922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1066419979 and 1066420006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066420021) 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, 14411045 + ... + 14411118.

It is an arithmetic number, because the mean of its divisors is an integer number (273810558).

Almost surely, 2^1066420031 is an apocalyptic number.

1066420031 is a deficient number, since it is larger than the sum of its proper divisors (28822201).

1066420031 is an equidigital number, since it uses as much as digits as its factorization.

1066420031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28822200.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1066420031 is about 32656.0871967234. The cubic root of 1066420031 is about 1021.6671541054.

Adding to 1066420031 its reverse (1300246601), we get a palindrome (2366666632).

The spelling of 1066420031 in words is "one billion, sixty-six million, four hundred twenty thousand, thirty-one".