3504871666 has 4 divisors (see below), whose sum is σ = 5257307502. Its totient is φ = 1752435832.

The previous prime is 3504871661. The next prime is 3504871673. The reversal of 3504871666 is 6661784053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6661784053 = 17609 ⋅378317.

It can be written as a sum of positive squares in only one way, i.e., 3495292641 + 9579025 = 59121^2 + 3095^2 .

It is a super-4 number, since 4×3504871666⁴ (a number of 39 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (3504871661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 876217915 + ... + 876217918.

Almost surely, 2^3504871666 is an apocalyptic number.

3504871666 is a deficient number, since it is larger than the sum of its proper divisors (1752435836).

3504871666 is a wasteful number, since it uses less digits than its factorization.

3504871666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752435835.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 3504871666 is about 59201.9566061798. The cubic root of 3504871666 is about 1518.9985996977.

The spelling of 3504871666 in words is "three billion, five hundred four million, eight hundred seventy-one thousand, six hundred sixty-six".