161667653 has 8 divisors (see below), whose sum is σ = 184941120. Its totient is φ = 138438720.

The previous prime is 161667643. The next prime is 161667661. The reversal of 161667653 is 356766161.

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

It is not a de Polignac number, because 161667653 - 2⁶ = 161667589 is a prime.

It is a super-2 number, since 2×161667653² = 52272860053056818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161667653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161667613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2948 + ... + 18221.

It is an arithmetic number, because the mean of its divisors is an integer number (23117640).

Almost surely, 2^161667653 is an apocalyptic number.

It is an amenable number.

161667653 is a deficient number, since it is larger than the sum of its proper divisors (23273467).

161667653 is a wasteful number, since it uses less digits than its factorization.

161667653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22267.

The product of its digits is 136080, while the sum is 41.

The square root of 161667653 is about 12714.8595352053. The cubic root of 161667653 is about 544.7631358553.

The spelling of 161667653 in words is "one hundred sixty-one million, six hundred sixty-seven thousand, six hundred fifty-three".