2166620546 has 16 divisors (see below), whose sum is σ = 3294333504. Its totient is φ = 1068551184.

The previous prime is 2166620543. The next prime is 2166620579. The reversal of 2166620546 is 6450266612.

It is not an unprimeable number, because it can be changed into a prime (2166620543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97316 + ... + 117488.

It is an arithmetic number, because the mean of its divisors is an integer number (205895844).

Almost surely, 2^2166620546 is an apocalyptic number.

2166620546 is a deficient number, since it is larger than the sum of its proper divisors (1127712958).

2166620546 is a wasteful number, since it uses less digits than its factorization.

2166620546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20905.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 2166620546 is about 46546.9713944957. The cubic root of 2166620546 is about 1293.9801645594.

The spelling of 2166620546 in words is "two billion, one hundred sixty-six million, six hundred twenty thousand, five hundred forty-six".