75051665 has 16 divisors (see below), whose sum is σ = 98324688. Its totient is φ = 54660096.

The previous prime is 75051661. The next prime is 75051667. The reversal of 75051665 is 56615057.

It can be written as a sum of positive squares in 8 ways, for example, as 4096 + 75047569 = 64^2 + 8663^2 .

It is a cyclic number.

It is not a de Polignac number, because 75051665 - 2² = 75051661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75051661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3164 + ... + 12653.

It is an arithmetic number, because the mean of its divisors is an integer number (6145293).

Almost surely, 2^75051665 is an apocalyptic number.

It is an amenable number.

75051665 is a deficient number, since it is larger than the sum of its proper divisors (23273023).

75051665 is a wasteful number, since it uses less digits than its factorization.

75051665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15908.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 75051665 is about 8663.2364044853. The cubic root of 75051665 is about 421.8131458653.

The spelling of 75051665 in words is "seventy-five million, fifty-one thousand, six hundred sixty-five".