166503630 has 16 divisors (see below), whose sum is σ = 399608784. Its totient is φ = 44400960.

The previous prime is 166503613. The next prime is 166503637. The reversal of 166503630 is 36305661.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5550121 = 166503630 / (1 + 6 + 6 + 5 + 0 + 3 + 6 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166503637) 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, 2775031 + ... + 2775090.

It is an arithmetic number, because the mean of its divisors is an integer number (24975549).

Almost surely, 2^166503630 is an apocalyptic number.

166503630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166503630 is an abundant number, since it is smaller than the sum of its proper divisors (233105154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166503630 is a wasteful number, since it uses less digits than its factorization.

166503630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550131.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 166503630 is about 12903.6285594402. The cubic root of 166503630 is about 550.1417045343.

The spelling of 166503630 in words is "one hundred sixty-six million, five hundred three thousand, six hundred thirty".