642662466 has 8 divisors (see below), whose sum is σ = 1285324944. Its totient is φ = 214220820.

The previous prime is 642662453. The next prime is 642662467. The reversal of 642662466 is 664266246.

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

642662466 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (642662467) 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, 53555200 + ... + 53555211.

It is an arithmetic number, because the mean of its divisors is an integer number (160665618).

Almost surely, 2^642662466 is an apocalyptic number.

642662466 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

642662466 is a wasteful number, since it uses less digits than its factorization.

642662466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107110416.

The product of its digits is 497664, while the sum is 42.

The square root of 642662466 is about 25350.7882717678. The cubic root of 642662466 is about 862.9672454244.

The spelling of 642662466 in words is "six hundred forty-two million, six hundred sixty-two thousand, four hundred sixty-six".