1066645377 has 18 divisors (see below), whose sum is σ = 1792255218. Its totient is φ = 609511392.

The previous prime is 1066645369. The next prime is 1066645379. The reversal of 1066645377 is 7735466601.

It can be written as a sum of positive squares in only one way, i.e., 1044517761 + 22127616 = 32319^2 + 4704^2 .

It is not a de Polignac number, because 1066645377 - 2³ = 1066645369 is a prime.

It is a super-2 number, since 2×1066645377² = 2275464720550944258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066645379) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1208908 + ... + 1209789.

Almost surely, 2^1066645377 is an apocalyptic number.

It is an amenable number.

1066645377 is a deficient number, since it is larger than the sum of its proper divisors (725609841).

1066645377 is a wasteful number, since it uses less digits than its factorization.

1066645377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418717 (or 2418707 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 1066645377 is about 32659.5373053569. The cubic root of 1066645377 is about 1021.7391121160.

The spelling of 1066645377 in words is "one billion, sixty-six million, six hundred forty-five thousand, three hundred seventy-seven".