75270661 has 2 divisors, whose sum is σ = 75270662. Its totient is φ = 75270660.

The previous prime is 75270659. The next prime is 75270673. The reversal of 75270661 is 16607257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75168900 + 101761 = 8670^2 + 319^2 .

It is an emirp because it is prime and its reverse (16607257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75270661 - 2¹ = 75270659 is a prime.

Together with 75270659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75270061) 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 as a sum of consecutive naturals, namely, 37635330 + 37635331.

It is an arithmetic number, because the mean of its divisors is an integer number (37635331).

Almost surely, 2^75270661 is an apocalyptic number.

It is an amenable number.

75270661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75270661 is an equidigital number, since it uses as much as digits as its factorization.

75270661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 75270661 is about 8675.8665849585. The cubic root of 75270661 is about 422.2230221309.

The spelling of 75270661 in words is "seventy-five million, two hundred seventy thousand, six hundred sixty-one".