1066643155 has 16 divisors (see below), whose sum is σ = 1365949440. Its totient is φ = 796787712.

The previous prime is 1066643143. The next prime is 1066643183. The reversal of 1066643155 is 5513466601.

It is a cyclic number.

It is not a de Polignac number, because 1066643155 - 2¹⁵ = 1066610387 is a prime.

It is a super-2 number, since 2×1066643155² = 2275455240216708050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38610 + ... + 60199.

It is an arithmetic number, because the mean of its divisors is an integer number (85371840).

Almost surely, 2^1066643155 is an apocalyptic number.

1066643155 is a deficient number, since it is larger than the sum of its proper divisors (299306285).

1066643155 is a wasteful number, since it uses less digits than its factorization.

1066643155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98958.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1066643155 is about 32659.5032877109. The cubic root of 1066643155 is about 1021.7384026313.

The spelling of 1066643155 in words is "one billion, sixty-six million, six hundred forty-three thousand, one hundred fifty-five".