665690793 has 8 divisors (see below), whose sum is σ = 898281888. Its totient is φ = 438446784.

The previous prime is 665690747. The next prime is 665690813. The reversal of 665690793 is 397096566.

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

It is not a de Polignac number, because 665690793 - 2¹⁰ = 665689769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665690393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336480 + ... + 1336977.

It is an arithmetic number, because the mean of its divisors is an integer number (112285236).

Almost surely, 2^665690793 is an apocalyptic number.

It is an amenable number.

665690793 is a deficient number, since it is larger than the sum of its proper divisors (232591095).

665690793 is a wasteful number, since it uses less digits than its factorization.

665690793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673543.

The product of its (nonzero) digits is 1837080, while the sum is 51.

The square root of 665690793 is about 25800.9843416874. The cubic root of 665690793 is about 873.1540044973.

The spelling of 665690793 in words is "six hundred sixty-five million, six hundred ninety thousand, seven hundred ninety-three".