1665514028 has 12 divisors (see below), whose sum is σ = 2915550960. Its totient is φ = 832499472.

The previous prime is 1665514007. The next prime is 1665514031. The reversal of 1665514028 is 8204155661.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1665513982 and 1665514000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49451 + ... + 76002.

It is an arithmetic number, because the mean of its divisors is an integer number (242962580).

Almost surely, 2^1665514028 is an apocalyptic number.

It is an amenable number.

1665514028 is a deficient number, since it is larger than the sum of its proper divisors (1250036932).

1665514028 is a wasteful number, since it uses less digits than its factorization.

1665514028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128776 (or 128774 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1665514028 is about 40810.7097218365. The cubic root of 1665514028 is about 1185.3577176140.

Adding to 1665514028 its reverse (8204155661), we get a palindrome (9869669689).

The spelling of 1665514028 in words is "one billion, six hundred sixty-five million, five hundred fourteen thousand, twenty-eight".