662654381 has 4 divisors (see below), whose sum is σ = 678064992. Its totient is φ = 647243772.

The previous prime is 662654359. The next prime is 662654383. The reversal of 662654381 is 183456266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662654381 is a prime.

It is a super-2 number, since 2×662654381² = 878221657316986322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662654383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7705241 + ... + 7705326.

It is an arithmetic number, because the mean of its divisors is an integer number (169516248).

Almost surely, 2^662654381 is an apocalyptic number.

It is an amenable number.

662654381 is a deficient number, since it is larger than the sum of its proper divisors (15410611).

662654381 is a wasteful number, since it uses less digits than its factorization.

662654381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15410610.

The product of its digits is 207360, while the sum is 41.

The square root of 662654381 is about 25742.0741394317. The cubic root of 662654381 is about 871.8244099250.

The spelling of 662654381 in words is "six hundred sixty-two million, six hundred fifty-four thousand, three hundred eighty-one".