1666000061 has 8 divisors (see below), whose sum is σ = 1817899200. Its totient is φ = 1514175040.

The previous prime is 1666000057. The next prime is 1666000069. The reversal of 1666000061 is 1600006661.

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

It is a cyclic number.

It is not a de Polignac number, because 1666000061 - 2² = 1666000057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666000069) 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, 35285 + ... + 67653.

It is an arithmetic number, because the mean of its divisors is an integer number (227237400).

Almost surely, 2^1666000061 is an apocalyptic number.

1666000061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1666000061 is a deficient number, since it is larger than the sum of its proper divisors (151899139).

1666000061 is a wasteful number, since it uses less digits than its factorization.

1666000061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37059.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1666000061 is about 40816.6640111609. The cubic root of 1666000061 is about 1185.4730107358.

The spelling of 1666000061 in words is "one billion, six hundred sixty-six million, sixty-one", and thus it is an aban number.