1066066690 has 64 divisors (see below), whose sum is σ = 2126476800. Its totient is φ = 382337280.

The previous prime is 1066066667. The next prime is 1066066699. The reversal of 1066066690 is 966606601.

It is a happy number.

1066066690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1066066690² = 2272996375055112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066066699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 909805 + ... + 910975.

It is an arithmetic number, because the mean of its divisors is an integer number (33226200).

Almost surely, 2^1066066690 is an apocalyptic number.

1066066690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1066066690 is a deficient number, since it is larger than the sum of its proper divisors (1060410110).

1066066690 is a wasteful number, since it uses less digits than its factorization.

1066066690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 1066066690 is about 32650.6767158048. The cubic root of 1066066690 is about 1021.5543040210.

The spelling of 1066066690 in words is "one billion, sixty-six million, sixty-six thousand, six hundred ninety".