166390635 has 8 divisors (see below), whose sum is σ = 266225040. Its totient is φ = 88741664.

The previous prime is 166390633. The next prime is 166390639. The reversal of 166390635 is 536093661.

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

It is a cyclic number.

It is not a de Polignac number, because 166390635 - 2¹ = 166390633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166390593 and 166390602.

It is not an unprimeable number, because it can be changed into a prime (166390633) 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, 5546340 + ... + 5546369.

It is an arithmetic number, because the mean of its divisors is an integer number (33278130).

Almost surely, 2^166390635 is an apocalyptic number.

166390635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166390635 is a deficient number, since it is larger than the sum of its proper divisors (99834405).

166390635 is a wasteful number, since it uses less digits than its factorization.

166390635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11092717.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 166390635 is about 12899.2493967672. The cubic root of 166390635 is about 550.0172281105.

The spelling of 166390635 in words is "one hundred sixty-six million, three hundred ninety thousand, six hundred thirty-five".