1011666071 has 8 divisors (see below), whose sum is σ = 1095193344. Its totient is φ = 928954080.

The previous prime is 1011666053. The next prime is 1011666079. The reversal of 1011666071 is 1706661101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011666071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011666079) 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, 201236 + ... + 206201.

It is an arithmetic number, because the mean of its divisors is an integer number (136899168).

Almost surely, 2^1011666071 is an apocalyptic number.

1011666071 is a deficient number, since it is larger than the sum of its proper divisors (83527273).

1011666071 is a wasteful number, since it uses less digits than its factorization.

1011666071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407641.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1011666071 is about 31806.6985240531. The cubic root of 1011666071 is about 1003.8736656724.

The spelling of 1011666071 in words is "one billion, eleven million, six hundred sixty-six thousand, seventy-one".