166886553601 has 8 divisors (see below), whose sum is σ = 169697892608. Its totient is φ = 164077650000.

The previous prime is 166886553593. The next prime is 166886553653. The reversal of 166886553601 is 106355688661.

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 166886553601 - 2³ = 166886553593 is a prime.

It is a super-2 number, since 2×166886553601² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166886553401) 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, 470385 + ... + 745006.

It is an arithmetic number, because the mean of its divisors is an integer number (21212236576).

Almost surely, 2^166886553601 is an apocalyptic number.

It is an amenable number.

166886553601 is a deficient number, since it is larger than the sum of its proper divisors (2811339007).

166886553601 is a wasteful number, since it uses less digits than its factorization.

166886553601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217703.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 166886553601 in words is "one hundred sixty-six billion, eight hundred eighty-six million, five hundred fifty-three thousand, six hundred one".