75488661 has 12 divisors (see below), whose sum is σ = 109238220. Its totient is φ = 50233920.

The previous prime is 75488657. The next prime is 75488681. The reversal of 75488661 is 16688457.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47196900 + 28291761 = 6870^2 + 5319^2 .

It is not a de Polignac number, because 75488661 - 2² = 75488657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75488681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2250 + ... + 12491.

It is an arithmetic number, because the mean of its divisors is an integer number (9103185).

Almost surely, 2^75488661 is an apocalyptic number.

It is an amenable number.

75488661 is a deficient number, since it is larger than the sum of its proper divisors (33749559).

75488661 is a wasteful number, since it uses less digits than its factorization.

75488661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316 (or 15313 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 75488661 is about 8688.4210878617. The cubic root of 75488661 is about 422.6302454323.

The spelling of 75488661 in words is "seventy-five million, four hundred eighty-eight thousand, six hundred sixty-one".