61659201 has 4 divisors (see below), whose sum is σ = 82212272. Its totient is φ = 41106132.

The previous prime is 61659181. The next prime is 61659287. The reversal of 61659201 is 10295616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61659201 - 2¹⁸ = 61397057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61659001) 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, 10276531 + ... + 10276536.

It is an arithmetic number, because the mean of its divisors is an integer number (20553068).

Almost surely, 2^61659201 is an apocalyptic number.

It is an amenable number.

61659201 is a deficient number, since it is larger than the sum of its proper divisors (20553071).

61659201 is a wasteful number, since it uses less digits than its factorization.

61659201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553070.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 61659201 is about 7852.3372953535. The cubic root of 61659201 is about 395.0626424178.

The spelling of 61659201 in words is "sixty-one million, six hundred fifty-nine thousand, two hundred one".