654943066 has 4 divisors (see below), whose sum is σ = 982414602. Its totient is φ = 327471532.

The previous prime is 654943057. The next prime is 654943087. The reversal of 654943066 is 660349456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 640343025 + 14600041 = 25305^2 + 3821^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163735765 + ... + 163735768.

Almost surely, 2^654943066 is an apocalyptic number.

654943066 is a deficient number, since it is larger than the sum of its proper divisors (327471536).

654943066 is a wasteful number, since it uses less digits than its factorization.

654943066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327471535.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 654943066 is about 25591.8554622364. The cubic root of 654943066 is about 868.4293969004.

The spelling of 654943066 in words is "six hundred fifty-four million, nine hundred forty-three thousand, sixty-six".