1066694375 has 20 divisors (see below), whose sum is σ = 1361339232. Its totient is φ = 835176000.

The previous prime is 1066694357. The next prime is 1066694401. The reversal of 1066694375 is 5734966601.

It is not a de Polignac number, because 1066694375 - 2⁶ = 1066694311 is a prime.

It is a super-2 number, since 2×1066694375² = 2275673779313281250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11219 + ... + 47531.

Almost surely, 2^1066694375 is an apocalyptic number.

1066694375 is a deficient number, since it is larger than the sum of its proper divisors (294644857).

1066694375 is an frugal number, since it uses more digits than its factorization.

1066694375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36380 (or 36365 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 1066694375 is about 32660.2874298436. The cubic root of 1066694375 is about 1021.7547569303.

The spelling of 1066694375 in words is "one billion, sixty-six million, six hundred ninety-four thousand, three hundred seventy-five".