1665162628 has 24 divisors (see below), whose sum is σ = 2964982104. Its totient is φ = 818054400.

The previous prime is 1665162619. The next prime is 1665162637. The reversal of 1665162628 is 8262615661.

It is an interprime number because it is at equal distance from previous prime (1665162619) and next prime (1665162637).

It can be written as a sum of positive squares in 4 ways, for example, as 159567424 + 1505595204 = 12632^2 + 38802^2 .

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, 264558 + ... + 270778.

It is an arithmetic number, because the mean of its divisors is an integer number (123540921).

Almost surely, 2^1665162628 is an apocalyptic number.

It is an amenable number.

1665162628 is a deficient number, since it is larger than the sum of its proper divisors (1299819476).

1665162628 is a wasteful number, since it uses less digits than its factorization.

1665162628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383 (or 7381 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 1665162628 is about 40806.4042522739. The cubic root of 1665162628 is about 1185.2743471565.

The spelling of 1665162628 in words is "one billion, six hundred sixty-five million, one hundred sixty-two thousand, six hundred twenty-eight".