662642047 has 4 divisors (see below), whose sum is σ = 665613760. Its totient is φ = 659670336.

The previous prime is 662642033. The next prime is 662642131. The reversal of 662642047 is 740246266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662642047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662641997 and 662642015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662642027) 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, 1485522 + ... + 1485967.

It is an arithmetic number, because the mean of its divisors is an integer number (166403440).

Almost surely, 2^662642047 is an apocalyptic number.

662642047 is a deficient number, since it is larger than the sum of its proper divisors (2971713).

662642047 is a wasteful number, since it uses less digits than its factorization.

662642047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971712.

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 662642047 is about 25741.8345694319. The cubic root of 662642047 is about 871.8190007960.

The spelling of 662642047 in words is "six hundred sixty-two million, six hundred forty-two thousand, forty-seven".