1665204632 has 64 divisors (see below), whose sum is σ = 3921288000. Its totient is φ = 658748160.

The previous prime is 1665204559. The next prime is 1665204637. The reversal of 1665204632 is 2364025661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1665204592 and 1665204601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665204637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12332 + ... + 59012.

It is an arithmetic number, because the mean of its divisors is an integer number (61270125).

Almost surely, 2^1665204632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665204632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1960644000).

1665204632 is an abundant number, since it is smaller than the sum of its proper divisors (2256083368).

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

1665204632 is a wasteful number, since it uses less digits than its factorization.

1665204632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46721 (or 46703 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1665204632 is about 40806.9189231434. The cubic root of 1665204632 is about 1185.2843133192.

The spelling of 1665204632 in words is "one billion, six hundred sixty-five million, two hundred four thousand, six hundred thirty-two".