662021493 has 16 divisors (see below), whose sum is σ = 1009234560. Its totient is φ = 378133056.

The previous prime is 662021491. The next prime is 662021509. The reversal of 662021493 is 394120266.

It is not a de Polignac number, because 662021493 - 2¹ = 662021491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662021491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55671 + ... + 66507.

It is an arithmetic number, because the mean of its divisors is an integer number (63077160).

Almost surely, 2^662021493 is an apocalyptic number.

It is an amenable number.

662021493 is a deficient number, since it is larger than the sum of its proper divisors (347213067).

662021493 is a wasteful number, since it uses less digits than its factorization.

662021493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13756.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 662021493 is about 25729.7783317307. The cubic root of 662021493 is about 871.5467674732.

The spelling of 662021493 in words is "six hundred sixty-two million, twenty-one thousand, four hundred ninety-three".