1666117077 has 8 divisors (see below), whose sum is σ = 2298092640. Its totient is φ = 1072443120.

The previous prime is 1666117069. The next prime is 1666117097. The reversal of 1666117077 is 7707116661.

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

It is not a de Polignac number, because 1666117077 - 2³ = 1666117069 is a prime.

It is a super-2 number, since 2×1666117077² = 5551892228542047858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666117097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575299 + ... + 9575472.

It is an arithmetic number, because the mean of its divisors is an integer number (287261580).

Almost surely, 2^1666117077 is an apocalyptic number.

It is an amenable number.

1666117077 is a deficient number, since it is larger than the sum of its proper divisors (631975563).

1666117077 is a wasteful number, since it uses less digits than its factorization.

1666117077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19150803.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 1666117077 is about 40818.0974201395. The cubic root of 1666117077 is about 1185.5007650490.

The spelling of 1666117077 in words is "one billion, six hundred sixty-six million, one hundred seventeen thousand, seventy-seven".