2051566066 has 16 divisors (see below), whose sum is σ = 3359743200. Its totient is φ = 931798080.

The previous prime is 2051566057. The next prime is 2051566067. The reversal of 2051566066 is 6606651502.

It is not an unprimeable number, because it can be changed into a prime (2051566067) 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, 7416 + ... + 64483.

It is an arithmetic number, because the mean of its divisors is an integer number (209983950).

Almost surely, 2^2051566066 is an apocalyptic number.

2051566066 is a deficient number, since it is larger than the sum of its proper divisors (1308177134).

2051566066 is a wasteful number, since it uses less digits than its factorization.

2051566066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73209.

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

The square root of 2051566066 is about 45294.2166948497. The cubic root of 2051566066 is about 1270.6574945040.

The spelling of 2051566066 in words is "two billion, fifty-one million, five hundred sixty-six thousand, sixty-six".