420166618 has 8 divisors (see below), whose sum is σ = 630701460. Its totient is φ = 209932800.

The previous prime is 420166603. The next prime is 420166651. The reversal of 420166618 is 816661024.

It can be written as a sum of positive squares in 2 ways, for example, as 388996729 + 31169889 = 19723^2 + 5583^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71733 + ... + 77368.

Almost surely, 2^420166618 is an apocalyptic number.

420166618 is a deficient number, since it is larger than the sum of its proper divisors (210534842).

420166618 is a wasteful number, since it uses less digits than its factorization.

420166618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150512.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 420166618 is about 20497.9661917957. The cubic root of 420166618 is about 748.9862558626.

The spelling of 420166618 in words is "four hundred twenty million, one hundred sixty-six thousand, six hundred eighteen".