75661351 has 4 divisors (see below), whose sum is σ = 75696912. Its totient is φ = 75625792.

The previous prime is 75661349. The next prime is 75661357. The reversal of 75661351 is 15316657.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75661351 - 2¹ = 75661349 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 (75661357) 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, 14371 + ... + 18916.

It is an arithmetic number, because the mean of its divisors is an integer number (18924228).

Almost surely, 2^75661351 is an apocalyptic number.

75661351 is a deficient number, since it is larger than the sum of its proper divisors (35561).

75661351 is a wasteful number, since it uses less digits than its factorization.

75661351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35560.

The product of its digits is 18900, while the sum is 34.

The square root of 75661351 is about 8698.3533499163. The cubic root of 75661351 is about 422.9522736385.

The spelling of 75661351 in words is "seventy-five million, six hundred sixty-one thousand, three hundred fifty-one".