664001654 has 8 divisors (see below), whose sum is σ = 1005672720. Its totient is φ = 328777416.

The previous prime is 664001647. The next prime is 664001671. The reversal of 664001654 is 456100466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 664001654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611449 + ... + 1611860.

It is an arithmetic number, because the mean of its divisors is an integer number (125709090).

Almost surely, 2^664001654 is an apocalyptic number.

664001654 is a deficient number, since it is larger than the sum of its proper divisors (341671066).

664001654 is a wasteful number, since it uses less digits than its factorization.

664001654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223414.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 664001654 is about 25768.2295472545. The cubic root of 664001654 is about 872.4148586744.

The spelling of 664001654 in words is "six hundred sixty-four million, one thousand, six hundred fifty-four".