662020406 has 4 divisors (see below), whose sum is σ = 993030612. Its totient is φ = 331010202.

The previous prime is 662020397. The next prime is 662020423. The reversal of 662020406 is 604020266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604020266 = 2 ⋅302010133.

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, 165505100 + ... + 165505103.

It is an arithmetic number, because the mean of its divisors is an integer number (248257653).

Almost surely, 2^662020406 is an apocalyptic number.

662020406 is a deficient number, since it is larger than the sum of its proper divisors (331010206).

662020406 is a wasteful number, since it uses less digits than its factorization.

662020406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331010205.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 662020406 is about 25729.7572083376. The cubic root of 662020406 is about 871.5462904636.

The spelling of 662020406 in words is "six hundred sixty-two million, twenty thousand, four hundred six".