1066946399 has 8 divisors (see below), whose sum is σ = 1079941632. Its totient is φ = 1054024920.

The previous prime is 1066946371. The next prime is 1066946411. The reversal of 1066946399 is 9936496601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1066946399 - 2¹⁶ = 1066880863 is a prime.

It is a super-3 number, since 3×1066946399³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066946399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066946599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10952 + ... + 47474.

It is an arithmetic number, because the mean of its divisors is an integer number (134992704).

Almost surely, 2^1066946399 is an apocalyptic number.

1066946399 is a deficient number, since it is larger than the sum of its proper divisors (12995233).

1066946399 is a wasteful number, since it uses less digits than its factorization.

1066946399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36877.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 1066946399 is about 32664.1454656325. The cubic root of 1066946399 is about 1021.8352193537.

The spelling of 1066946399 in words is "one billion, sixty-six million, nine hundred forty-six thousand, three hundred ninety-nine".