662767 has 8 divisors (see below), whose sum is σ = 768416. Its totient is φ = 559872.

The previous prime is 662743. The next prime is 662771. The reversal of 662767 is 767266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 8-Lehmer number, since φ(662767) divides (662767-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 662767 - 2⁷ = 662639 is a prime.

It is a Duffinian number.

662767 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (96052).

2⁶⁶²⁷⁶⁷ is an apocalyptic number.

662767 is a deficient number, since it is larger than the sum of its proper divisors (105649).

662767 is a wasteful number, since it uses less digits than its factorization.

662767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its digits is 21168, while the sum is 34.

The square root of 662767 is about 814.1050300790. The cubic root of 662767 is about 87.1873796370.

The spelling of 662767 in words is "six hundred sixty-two thousand, seven hundred sixty-seven".