654942666 has 16 divisors (see below), whose sum is σ = 1497011904. Its totient is φ = 187126464.

The previous prime is 654942653. The next prime is 654942679. The reversal of 654942666 is 666249456.

It is an interprime number because it is at equal distance from previous prime (654942653) and next prime (654942679).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7796895 + ... + 7796978.

It is an arithmetic number, because the mean of its divisors is an integer number (93563244).

Almost surely, 2^654942666 is an apocalyptic number.

654942666 is an abundant number, since it is smaller than the sum of its proper divisors (842069238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654942666 is a wasteful number, since it uses less digits than its factorization.

654942666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15593885.

The product of its digits is 1866240, while the sum is 48.

The square root of 654942666 is about 25591.8476472489. The cubic root of 654942666 is about 868.4292201055.

The spelling of 654942666 in words is "six hundred fifty-four million, nine hundred forty-two thousand, six hundred sixty-six".