161667363 has 16 divisors (see below), whose sum is σ = 253241856. Its totient is φ = 90443040.

The previous prime is 161667353. The next prime is 161667397. The reversal of 161667363 is 363766161.

It is not a de Polignac number, because 161667363 - 2¹⁸ = 161405219 is a prime.

It is a super-2 number, since 2×161667363² = 52272672518747538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (161667323) 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 15 ways as a sum of consecutive naturals, for example, 187995 + ... + 188852.

It is an arithmetic number, because the mean of its divisors is an integer number (15827616).

Almost surely, 2^161667363 is an apocalyptic number.

161667363 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161667363 is a deficient number, since it is larger than the sum of its proper divisors (91574493).

161667363 is a wasteful number, since it uses less digits than its factorization.

161667363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376874.

The product of its digits is 81648, while the sum is 39.

The square root of 161667363 is about 12714.8481312204. The cubic root of 161667363 is about 544.7628101224.

The spelling of 161667363 in words is "one hundred sixty-one million, six hundred sixty-seven thousand, three hundred sixty-three".