495772866 has 32 divisors (see below), whose sum is σ = 1149621120. Its totient is φ = 158072112.

The previous prime is 495772859. The next prime is 495772867. The reversal of 495772866 is 668277594.

495772866 is a `hidden beast` number, since 4 + 9 + 577 + 2 + 8 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (495772867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198345 + ... + 200828.

It is an arithmetic number, because the mean of its divisors is an integer number (35925660).

Almost surely, 2^495772866 is an apocalyptic number.

495772866 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

495772866 is an abundant number, since it is smaller than the sum of its proper divisors (653848254).

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

495772866 is a wasteful number, since it uses less digits than its factorization.

495772866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399207 (or 399201 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 495772866 is about 22265.9575585691. The cubic root of 495772866 is about 791.4574739508.

The spelling of 495772866 in words is "four hundred ninety-five million, seven hundred seventy-two thousand, eight hundred sixty-six".