75572661 has 4 divisors (see below), whose sum is σ = 100763552. Its totient is φ = 50381772.

The previous prime is 75572657. The next prime is 75572681. The reversal of 75572661 is 16627557.

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.

It is not a de Polignac number, because 75572661 - 2² = 75572657 is a prime.

It is a super-2 number, since 2×75572661² = 11422454181241842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75572621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12595441 + ... + 12595446.

It is an arithmetic number, because the mean of its divisors is an integer number (25190888).

Almost surely, 2^75572661 is an apocalyptic number.

It is an amenable number.

75572661 is a deficient number, since it is larger than the sum of its proper divisors (25190891).

75572661 is a wasteful number, since it uses less digits than its factorization.

75572661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25190890.

The product of its digits is 88200, while the sum is 39.

The square root of 75572661 is about 8693.2537636952. The cubic root of 75572661 is about 422.7869479109.

The spelling of 75572661 in words is "seventy-five million, five hundred seventy-two thousand, six hundred sixty-one".