664372154 has 8 divisors (see below), whose sum is σ = 997160340. Its totient is φ = 331985376.

The previous prime is 664372153. The next prime is 664372169. The reversal of 664372154 is 451273466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 659205625 + 5166529 = 25675^2 + 2273^2 .

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

It is not an unprimeable number, because it can be changed into a prime (664372153) 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, 96179 + ... + 102854.

Almost surely, 2^664372154 is an apocalyptic number.

664372154 is a deficient number, since it is larger than the sum of its proper divisors (332788186).

664372154 is a wasteful number, since it uses less digits than its factorization.

664372154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200704.

The product of its digits is 120960, while the sum is 38.

The square root of 664372154 is about 25775.4176299823. The cubic root of 664372154 is about 872.5770920078.

The spelling of 664372154 in words is "six hundred sixty-four million, three hundred seventy-two thousand, one hundred fifty-four".