495865661 has 8 divisors (see below), whose sum is σ = 501228000. Its totient is φ = 490512400.

The previous prime is 495865631. The next prime is 495865663. The reversal of 495865661 is 166568594.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 495865661 - 2⁶ = 495865597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495865663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210830 + ... + 213168.

It is an arithmetic number, because the mean of its divisors is an integer number (62653500).

Almost surely, 2^495865661 is an apocalyptic number.

It is an amenable number.

495865661 is a deficient number, since it is larger than the sum of its proper divisors (5362339).

495865661 is a wasteful number, since it uses less digits than its factorization.

495865661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539.

The product of its digits is 1555200, while the sum is 50.

The square root of 495865661 is about 22268.0412474919. The cubic root of 495865661 is about 791.5068505368.

The spelling of 495865661 in words is "four hundred ninety-five million, eight hundred sixty-five thousand, six hundred sixty-one".