1042636666 has 32 divisors (see below), whose sum is σ = 1670644800. Its totient is φ = 486622080.

The previous prime is 1042636663. The next prime is 1042636703. The reversal of 1042636666 is 6666362401.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1042636663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 873366 + ... + 874558.

It is an arithmetic number, because the mean of its divisors is an integer number (52207650).

Almost surely, 2^1042636666 is an apocalyptic number.

1042636666 is a deficient number, since it is larger than the sum of its proper divisors (628008134).

1042636666 is a wasteful number, since it uses less digits than its factorization.

1042636666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 1042636666 is about 32289.8848867567. The cubic root of 1042636666 is about 1014.0148873450.

The spelling of 1042636666 in words is "one billion, forty-two million, six hundred thirty-six thousand, six hundred sixty-six".