665497474 has 8 divisors (see below), whose sum is σ = 1004946300. Its totient is φ = 330515376.

The previous prime is 665497463. The next prime is 665497499. The reversal of 665497474 is 474794566.

It can be written as a sum of positive squares in 2 ways, for example, as 554932249 + 110565225 = 23557^2 + 10515^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116309 + ... + 1116904.

Almost surely, 2^665497474 is an apocalyptic number.

665497474 is a deficient number, since it is larger than the sum of its proper divisors (339448826).

665497474 is a wasteful number, since it uses less digits than its factorization.

665497474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233364.

The product of its digits is 5080320, while the sum is 52.

The square root of 665497474 is about 25797.2377203452. The cubic root of 665497474 is about 873.0694739599.

The spelling of 665497474 in words is "six hundred sixty-five million, four hundred ninety-seven thousand, four hundred seventy-four".