1665794652 has 12 divisors (see below), whose sum is σ = 3886854216. Its totient is φ = 555264880.

The previous prime is 1665794609. The next prime is 1665794653. The reversal of 1665794652 is 2564975661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1665794652² = 5549743645263602208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1665794595 and 1665794604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665794653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69408099 + ... + 69408122.

It is an arithmetic number, because the mean of its divisors is an integer number (323904518).

Almost surely, 2^1665794652 is an apocalyptic number.

1665794652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1665794652 is an abundant number, since it is smaller than the sum of its proper divisors (2221059564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665794652 is a wasteful number, since it uses less digits than its factorization.

1665794652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138816228 (or 138816226 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The square root of 1665794652 is about 40814.1476941514. The cubic root of 1665794652 is about 1185.4242878816.

The spelling of 1665794652 in words is "one billion, six hundred sixty-five million, seven hundred ninety-four thousand, six hundred fifty-two".