6215005666 has 8 divisors (see below), whose sum is σ = 9326006784. Its totient is φ = 3106336740.

The previous prime is 6215005663. The next prime is 6215005681. The reversal of 6215005666 is 6665005126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6215005663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576370 + ... + 587053.

It is an arithmetic number, because the mean of its divisors is an integer number (1165750848).

Almost surely, 2^6215005666 is an apocalyptic number.

6215005666 is a deficient number, since it is larger than the sum of its proper divisors (3111001118).

6215005666 is a wasteful number, since it uses less digits than its factorization.

6215005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166096.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6215005666 is about 78835.3072296925. The cubic root of 6215005666 is about 1838.5714401970.

The spelling of 6215005666 in words is "six billion, two hundred fifteen million, five thousand, six hundred sixty-six".