654409966 has 16 divisors (see below), whose sum is σ = 1127545056. Its totient is φ = 279036576.

The previous prime is 654409957. The next prime is 654409993. The reversal of 654409966 is 669904456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115881 + ... + 121396.

It is an arithmetic number, because the mean of its divisors is an integer number (70471566).

Almost surely, 2^654409966 is an apocalyptic number.

654409966 is a deficient number, since it is larger than the sum of its proper divisors (473135090).

654409966 is a wasteful number, since it uses less digits than its factorization.

654409966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237483.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The square root of 654409966 is about 25581.4379189286. The cubic root of 654409966 is about 868.1937095543.

The spelling of 654409966 in words is "six hundred fifty-four million, four hundred nine thousand, nine hundred sixty-six".