642166314 has 16 divisors (see below), whose sum is σ = 1328620320. Its totient is φ = 206674160.

The previous prime is 642166303. The next prime is 642166367. The reversal of 642166314 is 413661246.

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, 1845132 + ... + 1845479.

It is an arithmetic number, because the mean of its divisors is an integer number (83038770).

Almost surely, 2^642166314 is an apocalyptic number.

642166314 is an abundant number, since it is smaller than the sum of its proper divisors (686454006).

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

642166314 is a wasteful number, since it uses less digits than its factorization.

642166314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690645.

The product of its digits is 20736, while the sum is 33.

The square root of 642166314 is about 25341.0006511187. Note that the first 3 decimals coincide. The cubic root of 642166314 is about 862.7451105926.

Subtracting from 642166314 its sum of digits (33), we obtain a square (642166281 = 25341²).

The spelling of 642166314 in words is "six hundred forty-two million, one hundred sixty-six thousand, three hundred fourteen".