166101011661 has 8 divisors (see below), whose sum is σ = 238504016800. Its totient is φ = 102216007152.

The previous prime is 166101011653. The next prime is 166101011669. The reversal of 166101011661 is 166110101661.

It is an interprime number because it is at equal distance from previous prime (166101011653) and next prime (166101011669).

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

It is not a de Polignac number, because 166101011661 - 2³ = 166101011653 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 (166101011669) 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, 2129500111 + ... + 2129500188.

It is an arithmetic number, because the mean of its divisors is an integer number (29813002100).

Almost surely, 2^166101011661 is an apocalyptic number.

It is an amenable number.

166101011661 is a deficient number, since it is larger than the sum of its proper divisors (72403005139).

166101011661 is a wasteful number, since it uses less digits than its factorization.

166101011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259000315.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 166101011661 in words is "one hundred sixty-six billion, one hundred one million, eleven thousand, six hundred sixty-one".