1066666667 has 6 divisors (see below), whose sum is σ = 1172451924. Its totient is φ = 969696860.

The previous prime is 1066666637. The next prime is 1066666681. The reversal of 1066666667 is 7666666601.

It is a happy number.

It is not a de Polignac number, because 1066666667 - 2¹⁴ = 1066650283 is a prime.

It is a super-4 number, since 4×1066666667⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066666637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4407593 + ... + 4407834.

It is an arithmetic number, because the mean of its divisors is an integer number (195408654).

Almost surely, 2^1066666667 is an apocalyptic number.

1066666667 is a deficient number, since it is larger than the sum of its proper divisors (105785257).

1066666667 is an equidigital number, since it uses as much as digits as its factorization.

1066666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8815449 (or 8815438 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 50.

The square root of 1066666667 is about 32659.8632422121. The cubic root of 1066666667 is about 1021.7459099645.

The spelling of 1066666667 in words is "one billion, sixty-six million, six hundred sixty-six thousand, six hundred sixty-seven".