166420402 has 8 divisors (see below), whose sum is σ = 250444656. Its totient is φ = 82938852.

The previous prime is 166420367. The next prime is 166420403. The reversal of 166420402 is 204024661.

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

It is not an unprimeable number, because it can be changed into a prime (166420403) 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, 134908 + ... + 136135.

It is an arithmetic number, because the mean of its divisors is an integer number (31305582).

Almost surely, 2^166420402 is an apocalyptic number.

166420402 is a deficient number, since it is larger than the sum of its proper divisors (84024254).

166420402 is a wasteful number, since it uses less digits than its factorization.

166420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271352.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 166420402 is about 12900.4031719943. The cubic root of 166420402 is about 550.0500252019.

The spelling of 166420402 in words is "one hundred sixty-six million, four hundred twenty thousand, four hundred two".