75478665 has 8 divisors (see below), whose sum is σ = 120765888. Its totient is φ = 40255280.

The previous prime is 75478639. The next prime is 75478679. The reversal of 75478665 is 56687457.

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

It is not a de Polignac number, because 75478665 - 2¹⁰ = 75477641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2515941 + ... + 2515970.

It is an arithmetic number, because the mean of its divisors is an integer number (15095736).

Almost surely, 2^75478665 is an apocalyptic number.

It is an amenable number.

75478665 is a deficient number, since it is larger than the sum of its proper divisors (45287223).

75478665 is a wasteful number, since it uses less digits than its factorization.

75478665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031919.

The product of its digits is 1411200, while the sum is 48.

The square root of 75478665 is about 8687.8458204551. The cubic root of 75478665 is about 422.6115900989.

The spelling of 75478665 in words is "seventy-five million, four hundred seventy-eight thousand, six hundred sixty-five".