1669212736 has 21 divisors (see below), whose sum is σ = 3312992739. Its totient is φ = 834442944.

The previous prime is 1669212731. The next prime is 1669212749. The reversal of 1669212736 is 6372129661.

The square root of 1669212736 is 40856.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1669212692 and 1669212701.

It is not an unprimeable number, because it can be changed into a prime (1669212731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 324295 + ... + 329401.

It is an arithmetic number, because the mean of its divisors is an integer number (157761559).

Almost surely, 2^1669212736 is an apocalyptic number.

1669212736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1669212736 is the 40856-th square number.

It is an amenable number.

1669212736 is a deficient number, since it is larger than the sum of its proper divisors (1643780003).

1669212736 is an frugal number, since it uses more digits than its factorization.

1669212736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226 (or 5109 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The cubic root of 1669212736 is about 1186.2345341223.

The spelling of 1669212736 in words is "one billion, six hundred sixty-nine million, two hundred twelve thousand, seven hundred thirty-six".