1020667081 has 4 divisors (see below), whose sum is σ = 1166476672. Its totient is φ = 874857492.

The previous prime is 1020667009. The next prime is 1020667111. The reversal of 1020667081 is 1807660201.

1020667081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020667081 - 2¹¹ = 1020665033 is a prime.

It is a super-2 number, since 2×1020667081² = 2083522580474121122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020667381) 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, 72904785 + ... + 72904798.

It is an arithmetic number, because the mean of its divisors is an integer number (291619168).

Almost surely, 2^1020667081 is an apocalyptic number.

It is an amenable number.

1020667081 is a deficient number, since it is larger than the sum of its proper divisors (145809591).

1020667081 is an equidigital number, since it uses as much as digits as its factorization.

1020667081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145809590.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1020667081 is about 31947.8806965345. The cubic root of 1020667081 is about 1006.8421058183.

The spelling of 1020667081 in words is "one billion, twenty million, six hundred sixty-seven thousand, eighty-one".