5211660646 has 16 divisors (see below), whose sum is σ = 7906996224. Its totient is φ = 2576141064.

The previous prime is 5211660637. The next prime is 5211660677. The reversal of 5211660646 is 6460661125.

It is a super-2 number, since 2×5211660646² = 54322813378130274632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35631 + ... + 108133.

It is an arithmetic number, because the mean of its divisors is an integer number (494187264).

Almost surely, 2^5211660646 is an apocalyptic number.

5211660646 is a deficient number, since it is larger than the sum of its proper divisors (2695335578).

5211660646 is a wasteful number, since it uses less digits than its factorization.

5211660646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72915.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 5211660646 is about 72191.8322665383. The cubic root of 5211660646 is about 1733.7722320602.

The spelling of 5211660646 in words is "five billion, two hundred eleven million, six hundred sixty thousand, six hundred forty-six".