1066656790 has 16 divisors (see below), whose sum is σ = 1920804912. Its totient is φ = 426479904.

The previous prime is 1066656769. The next prime is 1066656791. The reversal of 1066656790 is 976566601.

It is a super-2 number, since 2×1066656790² = 2275513415306208200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066656790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066656791) 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 7 ways as a sum of consecutive naturals, for example, 3052 + ... + 46288.

It is an arithmetic number, because the mean of its divisors is an integer number (120050307).

Almost surely, 2^1066656790 is an apocalyptic number.

1066656790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066656790 is a deficient number, since it is larger than the sum of its proper divisors (854148122).

1066656790 is a wasteful number, since it uses less digits than its factorization.

1066656790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45711.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1066656790 is about 32659.7120317984. The cubic root of 1066656790 is about 1021.7427562722.

The spelling of 1066656790 in words is "one billion, sixty-six million, six hundred fifty-six thousand, seven hundred ninety".