75283661 has 2 divisors, whose sum is σ = 75283662. Its totient is φ = 75283660.

The previous prime is 75283657. The next prime is 75283693. The reversal of 75283661 is 16638257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51566761 + 23716900 = 7181^2 + 4870^2 .

It is a cyclic number.

It is not a de Polignac number, because 75283661 - 2² = 75283657 is a prime.

It is a super-2 number, since 2×75283661² = 11335259227125842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75283261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37641830 + 37641831.

It is an arithmetic number, because the mean of its divisors is an integer number (37641831).

Almost surely, 2^75283661 is an apocalyptic number.

It is an amenable number.

75283661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75283661 is an equidigital number, since it uses as much as digits as its factorization.

75283661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 75283661 is about 8676.6157573100. The cubic root of 75283661 is about 422.2473281188.

The spelling of 75283661 in words is "seventy-five million, two hundred eighty-three thousand, six hundred sixty-one".