1643158066 has 32 divisors (see below), whose sum is σ = 2770044480. Its totient is φ = 724531200.

The previous prime is 1643158063. The next prime is 1643158081. The reversal of 1643158066 is 6608513461.

It is not an unprimeable number, because it can be changed into a prime (1643158063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156370 + ... + 166546.

It is an arithmetic number, because the mean of its divisors is an integer number (86563890).

Almost surely, 2^1643158066 is an apocalyptic number.

1643158066 is a deficient number, since it is larger than the sum of its proper divisors (1126886414).

1643158066 is a wasteful number, since it uses less digits than its factorization.

1643158066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1643158066 is about 40535.8861504223. The cubic root of 1643158066 is about 1180.0301787743.

The spelling of 1643158066 in words is "one billion, six hundred forty-three million, one hundred fifty-eight thousand, sixty-six".