495989966 has 16 divisors (see below), whose sum is σ = 769443840. Its totient is φ = 239642520.

The previous prime is 495989951. The next prime is 495989983. The reversal of 495989966 is 669989594.

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, 25970 + ... + 40821.

It is an arithmetic number, because the mean of its divisors is an integer number (48090240).

Almost surely, 2^495989966 is an apocalyptic number.

495989966 is a deficient number, since it is larger than the sum of its proper divisors (273453874).

495989966 is a wasteful number, since it uses less digits than its factorization.

495989966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66919.

The product of its digits is 37791360, while the sum is 65.

The square root of 495989966 is about 22270.8321802307. The cubic root of 495989966 is about 791.5729840662.

The spelling of 495989966 in words is "four hundred ninety-five million, nine hundred eighty-nine thousand, nine hundred sixty-six".