666066051 has 16 divisors (see below), whose sum is σ = 1127731200. Its totient is φ = 380609064.

The previous prime is 666066047. The next prime is 666066053. The reversal of 666066051 is 150660666.

It is not a de Polignac number, because 666066051 - 2² = 666066047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666065997 and 666066015.

It is not an unprimeable number, because it can be changed into a prime (666066053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1761891 + ... + 1762268.

It is an arithmetic number, because the mean of its divisors is an integer number (70483200).

Almost surely, 2^666066051 is an apocalyptic number.

666066051 is a deficient number, since it is larger than the sum of its proper divisors (461665149).

666066051 is a wasteful number, since it uses less digits than its factorization.

666066051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524175 (or 3524169 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 666066051 is about 25808.2554815315. The cubic root of 666066051 is about 873.3180428566.

The spelling of 666066051 in words is "six hundred sixty-six million, sixty-six thousand, fifty-one".