1066451857 has 4 divisors (see below), whose sum is σ = 1067497396. Its totient is φ = 1065406320.

The previous prime is 1066451843. The next prime is 1066451873. The reversal of 1066451857 is 7581546601.

1066451857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 537497856 + 528954001 = 23184^2 + 22999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066451857 is a prime.

It is a super-2 number, since 2×1066451857² = 2274639126597496898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066451357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521238 + ... + 523279.

It is an arithmetic number, because the mean of its divisors is an integer number (266874349).

Almost surely, 2^1066451857 is an apocalyptic number.

It is an amenable number.

1066451857 is a deficient number, since it is larger than the sum of its proper divisors (1045539).

1066451857 is a wasteful number, since it uses less digits than its factorization.

1066451857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045538.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1066451857 is about 32656.5744835554. The cubic root of 1066451857 is about 1021.6773174727.

The spelling of 1066451857 in words is "one billion, sixty-six million, four hundred fifty-one thousand, eight hundred fifty-seven".