662788427 has 4 divisors (see below), whose sum is σ = 757472496. Its totient is φ = 568104360.

The previous prime is 662788403. The next prime is 662788499. The reversal of 662788427 is 724887266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724887266 = 2 ⋅362443633.

It is a cyclic number.

It is not a de Polignac number, because 662788427 - 2²⁰ = 661739851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662788727) 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, 47342024 + ... + 47342037.

It is an arithmetic number, because the mean of its divisors is an integer number (189368124).

Almost surely, 2^662788427 is an apocalyptic number.

662788427 is a deficient number, since it is larger than the sum of its proper divisors (94684069).

662788427 is an equidigital number, since it uses as much as digits as its factorization.

662788427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94684068.

The product of its digits is 1806336, while the sum is 50.

The square root of 662788427 is about 25744.6776441268. The cubic root of 662788427 is about 871.8831920489.

The spelling of 662788427 in words is "six hundred sixty-two million, seven hundred eighty-eight thousand, four hundred twenty-seven".