1007666785 has 4 divisors (see below), whose sum is σ = 1209200148. Its totient is φ = 806133424.

The previous prime is 1007666783. The next prime is 1007666837. The reversal of 1007666785 is 5876667001.

1007666785 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 an emirpimes, since its reverse is a distinct semiprime: 5876667001 = 14293 ⋅411157.

It can be written as a sum of positive squares in 2 ways, for example, as 691111521 + 316555264 = 26289^2 + 17792^2 .

It is a cyclic number.

It is not a de Polignac number, because 1007666785 - 2¹ = 1007666783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1007666783) 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, 100766674 + ... + 100766683.

It is an arithmetic number, because the mean of its divisors is an integer number (302300037).

Almost surely, 2^1007666785 is an apocalyptic number.

It is an amenable number.

1007666785 is a deficient number, since it is larger than the sum of its proper divisors (201533363).

1007666785 is an equidigital number, since it uses as much as digits as its factorization.

1007666785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201533362.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1007666785 is about 31743.7676560297. The cubic root of 1007666785 is about 1002.5490916107.

The spelling of 1007666785 in words is "one billion, seven million, six hundred sixty-six thousand, seven hundred eighty-five".