1066870399 has 8 divisors (see below), whose sum is σ = 1235983520. Its totient is φ = 901933056.

The previous prime is 1066870397. The next prime is 1066870423. The reversal of 1066870399 is 9930786601.

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 1066870399 - 2¹ = 1066870397 is a prime.

It is a super-2 number, since 2×1066870399² = 2276424896524838402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066870393) 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, 1043394 + ... + 1044415.

It is an arithmetic number, because the mean of its divisors is an integer number (154497940).

Almost surely, 2^1066870399 is an apocalyptic number.

1066870399 is a deficient number, since it is larger than the sum of its proper divisors (169113121).

1066870399 is an equidigital number, since it uses as much as digits as its factorization.

1066870399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087889.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 1066870399 is about 32662.9820898215. The cubic root of 1066870399 is about 1021.8109565539.

The spelling of 1066870399 in words is "one billion, sixty-six million, eight hundred seventy thousand, three hundred ninety-nine".