61866345 has 16 divisors (see below), whose sum is σ = 99406080. Its totient is φ = 32855424.

The previous prime is 61866341. The next prime is 61866377. The reversal of 61866345 is 54366816.

It is not a de Polignac number, because 61866345 - 2² = 61866341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61866341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5044 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (6212880).

Almost surely, 2^61866345 is an apocalyptic number.

It is an amenable number.

61866345 is a deficient number, since it is larger than the sum of its proper divisors (37539735).

61866345 is a wasteful number, since it uses less digits than its factorization.

61866345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17504.

The product of its digits is 103680, while the sum is 39.

The square root of 61866345 is about 7865.5161941223. The cubic root of 61866345 is about 395.5045520543.

The spelling of 61866345 in words is "sixty-one million, eight hundred sixty-six thousand, three hundred forty-five".