6651566562 has 16 divisors (see below), whose sum is σ = 13387868352. Its totient is φ = 2203066320.

The previous prime is 6651566549. The next prime is 6651566563. The reversal of 6651566562 is 2656651566.

It is not an unprimeable number, because it can be changed into a prime (6651566563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529614 + ... + 3531497.

It is an arithmetic number, because the mean of its divisors is an integer number (836741772).

Almost surely, 2^6651566562 is an apocalyptic number.

6651566562 is an abundant number, since it is smaller than the sum of its proper divisors (6736301790).

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

6651566562 is a wasteful number, since it uses less digits than its factorization.

6651566562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061273.

The product of its digits is 1944000, while the sum is 48.

The square root of 6651566562 is about 81557.1367937840. The cubic root of 6651566562 is about 1880.6500093139.

It can be divided in two parts, 6651566 and 562, that added together give a triangular number (6652128 = T₃₆₄₇).

The spelling of 6651566562 in words is "six billion, six hundred fifty-one million, five hundred sixty-six thousand, five hundred sixty-two".