69850661 has 8 divisors (see below), whose sum is σ = 71303544. Its totient is φ = 68402880.

The previous prime is 69850643. The next prime is 69850663. The reversal of 69850661 is 16605896.

It can be written as a sum of positive squares in 4 ways, for example, as 2512225 + 67338436 = 1585^2 + 8206^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 69850661 - 2⁶ = 69850597 is a prime.

It is a super-2 number, since 2×69850661² = 9758229684273842, 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 (69850663) 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, 39251 + ... + 40991.

It is an arithmetic number, because the mean of its divisors is an integer number (8912943).

Almost surely, 2^69850661 is an apocalyptic number.

It is an amenable number.

69850661 is a deficient number, since it is larger than the sum of its proper divisors (1452883).

69850661 is a wasteful number, since it uses less digits than its factorization.

69850661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 69850661 is about 8357.6707879648. The cubic root of 69850661 is about 411.8352410151.

The spelling of 69850661 in words is "sixty-nine million, eight hundred fifty thousand, six hundred sixty-one".