5211000666 has 96 divisors (see below), whose sum is σ = 11762150400. Its totient is φ = 1666224000.

The previous prime is 5211000647. The next prime is 5211000713. The reversal of 5211000666 is 6660001125.

It is a happy number.

It is a super-3 number, since 3×5211000666³ (a number of 30 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14931060 + ... + 14931408.

It is an arithmetic number, because the mean of its divisors is an integer number (122522400).

Almost surely, 2^5211000666 is an apocalyptic number.

5211000666 is an abundant number, since it is smaller than the sum of its proper divisors (6551149734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5211000666 is a wasteful number, since it uses less digits than its factorization.

5211000666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 5211000666 is about 72187.2611060982. The cubic root of 5211000666 is about 1733.6990434050.

The spelling of 5211000666 in words is "five billion, two hundred eleven million, six hundred sixty-six", and thus it is an aban number.