1628668066 has 16 divisors (see below), whose sum is σ = 2473989120. Its totient is φ = 804066480.

The previous prime is 1628668039. The next prime is 1628668073. The reversal of 1628668066 is 6608668261.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38400 + ... + 68788.

It is an arithmetic number, because the mean of its divisors is an integer number (154624320).

Almost surely, 2^1628668066 is an apocalyptic number.

1628668066 is a deficient number, since it is larger than the sum of its proper divisors (845321054).

1628668066 is a wasteful number, since it uses less digits than its factorization.

1628668066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30729.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 1628668066 is about 40356.7598550726. The cubic root of 1628668066 is about 1176.5512791840.

The spelling of 1628668066 in words is "one billion, six hundred twenty-eight million, six hundred sixty-eight thousand, sixty-six".