75142556661 has 8 divisors (see below), whose sum is σ = 100191621600. Its totient is φ = 50094264752.

The previous prime is 75142556623. The next prime is 75142556677. The reversal of 75142556661 is 16665524157.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75142556661 - 2²¹ = 75140459509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75142556661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75142516661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94966 + ... + 399128.

It is an arithmetic number, because the mean of its divisors is an integer number (12523952700).

Almost surely, 2^75142556661 is an apocalyptic number.

It is an amenable number.

75142556661 is a deficient number, since it is larger than the sum of its proper divisors (25049064939).

75142556661 is a wasteful number, since it uses less digits than its factorization.

75142556661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386515.

The product of its digits is 1512000, while the sum is 48.

The spelling of 75142556661 in words is "seventy-five billion, one hundred forty-two million, five hundred fifty-six thousand, six hundred sixty-one".