1066640042 has 32 divisors (see below), whose sum is σ = 1810166400. Its totient is φ = 467691840.

The previous prime is 1066640041. The next prime is 1066640143. The reversal of 1066640042 is 2400466601.

It is a super-2 number, since 2×1066640042² = 2275441958395523528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066639987 and 1066640014.

It is not an unprimeable number, because it can be changed into a prime (1066640041) 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 15 ways as a sum of consecutive naturals, for example, 83117 + ... + 95087.

It is an arithmetic number, because the mean of its divisors is an integer number (56567700).

Almost surely, 2^1066640042 is an apocalyptic number.

1066640042 is a deficient number, since it is larger than the sum of its proper divisors (743526358).

1066640042 is a wasteful number, since it uses less digits than its factorization.

1066640042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12158.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1066640042 is about 32659.4556292661. The cubic root of 1066640042 is about 1021.7374086485.

The spelling of 1066640042 in words is "one billion, sixty-six million, six hundred forty thousand, forty-two".