78574665 has 16 divisors (see below), whose sum is σ = 135390528. Its totient is φ = 38682816.

The previous prime is 78574621. The next prime is 78574679. The reversal of 78574665 is 56647587.

It is not a de Polignac number, because 78574665 - 2⁷ = 78574537 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201279 + ... + 201668.

It is an arithmetic number, because the mean of its divisors is an integer number (8461908).

Almost surely, 2^78574665 is an apocalyptic number.

It is an amenable number.

78574665 is a deficient number, since it is larger than the sum of its proper divisors (56815863).

78574665 is a wasteful number, since it uses less digits than its factorization.

78574665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402968.

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

The square root of 78574665 is about 8864.2351615918. The cubic root of 78574665 is about 428.3125955363.

The spelling of 78574665 in words is "seventy-eight million, five hundred seventy-four thousand, six hundred sixty-five".