664154042 has 8 divisors (see below), whose sum is σ = 998278176. Its totient is φ = 331394652.

The previous prime is 664154009. The next prime is 664154047. The reversal of 664154042 is 240451466.

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

It is a super-2 number, since 2×664154042² = 882201183009875528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664154047) 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, 339968 + ... + 341915.

It is an arithmetic number, because the mean of its divisors is an integer number (124784772).

Almost surely, 2^664154042 is an apocalyptic number.

664154042 is a deficient number, since it is larger than the sum of its proper divisors (334124134).

664154042 is a wasteful number, since it uses less digits than its factorization.

664154042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682372.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 664154042 is about 25771.1862745975. The cubic root of 664154042 is about 872.4815931399.

The spelling of 664154042 in words is "six hundred sixty-four million, one hundred fifty-four thousand, forty-two".