666734573354 has 4 divisors (see below), whose sum is σ = 1000101860034. Its totient is φ = 333367286676.

The previous prime is 666734573347. The next prime is 666734573369. The reversal of 666734573354 is 453375437666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 453375437666 = 2 ⋅226687718833.

It can be written as a sum of positive squares in only one way, i.e., 392972265625 + 273762307729 = 626875^2 + 523223^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666734573293 and 666734573302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166683643337 + ... + 166683643340.

Almost surely, 2^666734573354 is an apocalyptic number.

666734573354 is a deficient number, since it is larger than the sum of its proper divisors (333367286680).

666734573354 is a wasteful number, since it uses less digits than its factorization.

666734573354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333367286679.

The product of its digits is 114307200, while the sum is 59.

The spelling of 666734573354 in words is "six hundred sixty-six billion, seven hundred thirty-four million, five hundred seventy-three thousand, three hundred fifty-four".