166158653 has 4 divisors (see below), whose sum is σ = 166184508. Its totient is φ = 166132800.

The previous prime is 166158649. The next prime is 166158659. The reversal of 166158653 is 356851661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 143472484 + 22686169 = 11978^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 166158653 - 2² = 166158649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166158653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166158659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003 + ... + 18903.

It is an arithmetic number, because the mean of its divisors is an integer number (41546127).

Almost surely, 2^166158653 is an apocalyptic number.

It is an amenable number.

166158653 is a deficient number, since it is larger than the sum of its proper divisors (25855).

166158653 is a wasteful number, since it uses less digits than its factorization.

166158653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25854.

The product of its digits is 129600, while the sum is 41.

The square root of 166158653 is about 12890.2541867878. The cubic root of 166158653 is about 549.7614976926.

The spelling of 166158653 in words is "one hundred sixty-six million, one hundred fifty-eight thousand, six hundred fifty-three".