164661503 has 4 divisors (see below), whose sum is σ = 164791128. Its totient is φ = 164531880.

The previous prime is 164661493. The next prime is 164661521. The reversal of 164661503 is 305166461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164661503 - 2¹² = 164657407 is a prime.

It is a super-3 number, since 3×164661503³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 164661503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164661703) 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, 62888 + ... + 65453.

It is an arithmetic number, because the mean of its divisors is an integer number (41197782).

Almost surely, 2^164661503 is an apocalyptic number.

164661503 is a deficient number, since it is larger than the sum of its proper divisors (129625).

164661503 is a wasteful number, since it uses less digits than its factorization.

164661503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129624.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 164661503 is about 12832.0498362499. The cubic root of 164661503 is about 548.1053296656.

The spelling of 164661503 in words is "one hundred sixty-four million, six hundred sixty-one thousand, five hundred three".