166530634 has 4 divisors (see below), whose sum is σ = 249795954. Its totient is φ = 83265316.

The previous prime is 166530631. The next prime is 166530641. The reversal of 166530634 is 436035661.

166530634 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 166332609 + 198025 = 12897^2 + 445^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166530634.

It is not an unprimeable number, because it can be changed into a prime (166530631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41632657 + ... + 41632660.

Almost surely, 2^166530634 is an apocalyptic number.

166530634 is a deficient number, since it is larger than the sum of its proper divisors (83265320).

166530634 is an equidigital number, since it uses as much as digits as its factorization.

166530634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83265319.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 166530634 is about 12904.6748893570. The cubic root of 166530634 is about 550.1714440732.

The spelling of 166530634 in words is "one hundred sixty-six million, five hundred thirty thousand, six hundred thirty-four".