57661001 has 4 divisors (see below), whose sum is σ = 58232004. Its totient is φ = 57090000.

The previous prime is 57660997. The next prime is 57661003. The reversal of 57661001 is 10016675.

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 53640976 + 4020025 = 7324^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 57661001 - 2² = 57660997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57661003) 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, 285350 + ... + 285551.

It is an arithmetic number, because the mean of its divisors is an integer number (14558001).

Almost surely, 2^57661001 is an apocalyptic number.

It is an amenable number.

57661001 is a deficient number, since it is larger than the sum of its proper divisors (571003).

57661001 is a wasteful number, since it uses less digits than its factorization.

57661001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571002.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 57661001 is about 7593.4841146867. The cubic root of 57661001 is about 386.3320386549.

Adding to 57661001 its reverse (10016675), we get a palindrome (67677676).

The spelling of 57661001 in words is "fifty-seven million, six hundred sixty-one thousand, one".