1020666511 has 8 divisors (see below), whose sum is σ = 1034221680. Its totient is φ = 1007190912.

The previous prime is 1020666499. The next prime is 1020666541. The reversal of 1020666511 is 1156660201.

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 1020666511 - 2⁹ = 1020665999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020666511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020666541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6156 + ... + 45598.

It is an arithmetic number, because the mean of its divisors is an integer number (129277710).

Almost surely, 2^1020666511 is an apocalyptic number.

1020666511 is a deficient number, since it is larger than the sum of its proper divisors (13555169).

1020666511 is a wasteful number, since it uses less digits than its factorization.

1020666511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39785.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1020666511 is about 31947.8717757537. The cubic root of 1020666511 is about 1006.8419183918.

The spelling of 1020666511 in words is "one billion, twenty million, six hundred sixty-six thousand, five hundred eleven".