75531660 has 96 divisors (see below), whose sum is σ = 221840640. Its totient is φ = 19176192.

The previous prime is 75531653. The next prime is 75531667. The reversal of 75531660 is 6613557.

It is an interprime number because it is at equal distance from previous prime (75531653) and next prime (75531667).

It is not an unprimeable number, because it can be changed into a prime (75531667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144159 + ... + 144681.

It is an arithmetic number, because the mean of its divisors is an integer number (2310840).

Almost surely, 2^75531660 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 75531660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110920320).

75531660 is an abundant number, since it is smaller than the sum of its proper divisors (146308980).

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

75531660 is a wasteful number, since it uses less digits than its factorization.

75531660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 75531660 is about 8690.8952358201. The cubic root of 75531660 is about 422.7104748263.

The spelling of 75531660 in words is "seventy-five million, five hundred thirty-one thousand, six hundred sixty".