1066840671 has 32 divisors (see below), whose sum is σ = 1682634240. Its totient is φ = 594912384.

The previous prime is 1066840637. The next prime is 1066840693. The reversal of 1066840671 is 1760486601.

It is a happy number.

It is not a de Polignac number, because 1066840671 - 2¹⁴ = 1066824287 is a prime.

It is a super-2 number, since 2×1066840671² = 2276298034599460482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066840631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14256 + ... + 48341.

It is an arithmetic number, because the mean of its divisors is an integer number (52582320).

Almost surely, 2^1066840671 is an apocalyptic number.

1066840671 is a deficient number, since it is larger than the sum of its proper divisors (615793569).

1066840671 is a wasteful number, since it uses less digits than its factorization.

1066840671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62655.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1066840671 is about 32662.5270149142. The cubic root of 1066840671 is about 1021.8014656547.

The spelling of 1066840671 in words is "one billion, sixty-six million, eight hundred forty thousand, six hundred seventy-one".