70669 has 4 divisors (see below), whose sum is σ = 74844. Its totient is φ = 66496.

The previous prime is 70667. The next prime is 70687. The reversal of 70669 is 96607.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44100 + 26569 = 210^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 70669 - 2¹ = 70667 is a prime.

It is a super-2 number, since 2×70669² = 9988215122, which contains 22 as substring.

It is a Duffinian number.

70669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70663) 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, 2062 + ... + 2095.

It is an arithmetic number, because the mean of its divisors is an integer number (18711).

2⁷⁰⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

70669 is a deficient number, since it is larger than the sum of its proper divisors (4175).

70669 is a wasteful number, since it uses less digits than its factorization.

70669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 70669 is about 265.8364158651. The cubic root of 70669 is about 41.3437293194.

The spelling of 70669 in words is "seventy thousand, six hundred sixty-nine".