601071661 has 4 divisors (see below), whose sum is σ = 621798300. Its totient is φ = 580345024.

The previous prime is 601071649. The next prime is 601071677. The reversal of 601071661 is 166170106.

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 322382025 + 278689636 = 17955^2 + 16694^2 .

It is a cyclic number.

It is not a de Polignac number, because 601071661 - 2¹³ = 601063469 is a prime.

It is a super-3 number, since 3×601071661³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601075661) 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, 10363276 + ... + 10363333.

It is an arithmetic number, because the mean of its divisors is an integer number (155449575).

Almost surely, 2^601071661 is an apocalyptic number.

It is an amenable number.

601071661 is a deficient number, since it is larger than the sum of its proper divisors (20726639).

601071661 is a wasteful number, since it uses less digits than its factorization.

601071661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20726638.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 601071661 is about 24516.7628572779. The cubic root of 601071661 is about 843.9345187962.

The spelling of 601071661 in words is "six hundred one million, seventy-one thousand, six hundred sixty-one".