642464166 has 16 divisors (see below), whose sum is σ = 1296938304. Its totient is φ = 212153064.

The previous prime is 642464117. The next prime is 642464177. The reversal of 642464166 is 661464246.

642464166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499720 + ... + 501003.

It is an arithmetic number, because the mean of its divisors is an integer number (81058644).

Almost surely, 2^642464166 is an apocalyptic number.

642464166 is an abundant number, since it is smaller than the sum of its proper divisors (654474138).

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

642464166 is a wasteful number, since it uses less digits than its factorization.

642464166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000835.

The product of its digits is 165888, while the sum is 39.

The square root of 642464166 is about 25346.8768490321. The cubic root of 642464166 is about 862.8784772048.

The spelling of 642464166 in words is "six hundred forty-two million, four hundred sixty-four thousand, one hundred sixty-six".