1025666532 has 72 divisors (see below), whose sum is σ = 2847499200. Its totient is φ = 308704320.

The previous prime is 1025666507. The next prime is 1025666539. The reversal of 1025666532 is 2356665201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1025666539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50313 + ... + 67695.

It is an arithmetic number, because the mean of its divisors is an integer number (39548600).

Almost surely, 2^1025666532 is an apocalyptic number.

1025666532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025666532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423749600).

1025666532 is an abundant number, since it is smaller than the sum of its proper divisors (1821832668).

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

1025666532 is a wasteful number, since it uses less digits than its factorization.

1025666532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17553 (or 17548 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1025666532 is about 32026.0289764435. The cubic root of 1025666532 is about 1008.4833401004.

The spelling of 1025666532 in words is "one billion, twenty-five million, six hundred sixty-six thousand, five hundred thirty-two".