422915661 has 80 divisors (see below), whose sum is σ = 781292160. Its totient is φ = 222549120.

The previous prime is 422915641. The next prime is 422915683. The reversal of 422915661 is 166519224.

422915661 is a `hidden beast` number, since 4 + 2 + 2 + 91 + 566 + 1 = 666.

It is not a de Polignac number, because 422915661 - 2¹⁰ = 422914637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422915611) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 398071 + ... + 399131.

It is an arithmetic number, because the mean of its divisors is an integer number (9766152).

Almost surely, 2^422915661 is an apocalyptic number.

It is an amenable number.

422915661 is a deficient number, since it is larger than the sum of its proper divisors (358376499).

422915661 is a wasteful number, since it uses less digits than its factorization.

422915661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136 (or 1127 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 422915661 is about 20564.9133477387. The cubic root of 422915661 is about 750.6161816216.

The spelling of 422915661 in words is "four hundred twenty-two million, nine hundred fifteen thousand, six hundred sixty-one".