666656058 has 16 divisors (see below), whose sum is σ = 1391282496. Its totient is φ = 212556960.

The previous prime is 666656057. The next prime is 666656113. The reversal of 666656058 is 850656666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666655998 and 666656016.

It is not an unprimeable number, because it can be changed into a prime (666656051) 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, 2415283 + ... + 2415558.

It is an arithmetic number, because the mean of its divisors is an integer number (86955156).

Almost surely, 2^666656058 is an apocalyptic number.

666656058 is an abundant number, since it is smaller than the sum of its proper divisors (724626438).

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

666656058 is a wasteful number, since it uses less digits than its factorization.

666656058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830869.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The square root of 666656058 is about 25819.6835379522. The cubic root of 666656058 is about 873.5758309497.

The spelling of 666656058 in words is "six hundred sixty-six million, six hundred fifty-six thousand, fifty-eight".