665764094 has 4 divisors (see below), whose sum is σ = 998646144. Its totient is φ = 332882046.

The previous prime is 665764007. The next prime is 665764157. The reversal of 665764094 is 490467566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 490467566 = 2 ⋅245233783.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166441022 + ... + 166441025.

It is an arithmetic number, because the mean of its divisors is an integer number (249661536).

Almost surely, 2^665764094 is an apocalyptic number.

665764094 is a deficient number, since it is larger than the sum of its proper divisors (332882050).

665764094 is a wasteful number, since it uses less digits than its factorization.

665764094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332882049.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 665764094 is about 25802.4048104048. The cubic root of 665764094 is about 873.1860517647.

The spelling of 665764094 in words is "six hundred sixty-five million, seven hundred sixty-four thousand, ninety-four".