75532661 has 4 divisors (see below), whose sum is σ = 75865632. Its totient is φ = 75199692.

The previous prime is 75532631. The next prime is 75532663. The reversal of 75532661 is 16623557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16623557 = 1429 ⋅11633.

It is a cyclic number.

It is not a de Polignac number, because 75532661 - 2²⁶ = 8423797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75532663) 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, 166145 + ... + 166598.

It is an arithmetic number, because the mean of its divisors is an integer number (18966408).

Almost surely, 2^75532661 is an apocalyptic number.

It is an amenable number.

75532661 is a deficient number, since it is larger than the sum of its proper divisors (332971).

75532661 is a wasteful number, since it uses less digits than its factorization.

75532661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332970.

The product of its digits is 37800, while the sum is 35.

The square root of 75532661 is about 8690.9528246332. The cubic root of 75532661 is about 422.7123421726.

The spelling of 75532661 in words is "seventy-five million, five hundred thirty-two thousand, six hundred sixty-one".