475215668 has 6 divisors (see below), whose sum is σ = 831627426. Its totient is φ = 237607832.

The previous prime is 475215659. The next prime is 475215703. The reversal of 475215668 is 866512574.

It can be written as a sum of positive squares in only one way, i.e., 260241424 + 214974244 = 16132^2 + 14662^2 .

It is a super-2 number, since 2×475215668² = 451659862225372448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59401955 + ... + 59401962.

It is an arithmetic number, because the mean of its divisors is an integer number (138604571).

Almost surely, 2^475215668 is an apocalyptic number.

It is an amenable number.

475215668 is a deficient number, since it is larger than the sum of its proper divisors (356411758).

475215668 is a wasteful number, since it uses less digits than its factorization.

475215668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118803921 (or 118803919 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 475215668 is about 21799.4419194621. The cubic root of 475215668 is about 780.3634444757.

The spelling of 475215668 in words is "four hundred seventy-five million, two hundred fifteen thousand, six hundred sixty-eight".