662499478 has 4 divisors (see below), whose sum is σ = 993749220. Its totient is φ = 331249738.

The previous prime is 662499449. The next prime is 662499491. The reversal of 662499478 is 874994266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874994266 = 2 ⋅437497133.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165624868 + ... + 165624871.

It is an arithmetic number, because the mean of its divisors is an integer number (248437305).

Almost surely, 2^662499478 is an apocalyptic number.

662499478 is a deficient number, since it is larger than the sum of its proper divisors (331249742).

662499478 is a wasteful number, since it uses less digits than its factorization.

662499478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331249741.

The product of its digits is 5225472, while the sum is 55.

The square root of 662499478 is about 25739.0652122411. The cubic root of 662499478 is about 871.7564716730.

The spelling of 662499478 in words is "six hundred sixty-two million, four hundred ninety-nine thousand, four hundred seventy-eight".