61665960238 has 32 divisors (see below), whose sum is σ = 102547632960. Its totient is φ = 27705807360.

The previous prime is 61665960233. The next prime is 61665960287. The reversal of 61665960238 is 83206956616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61665960233) 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, 575323 + ... + 674038.

It is an arithmetic number, because the mean of its divisors is an integer number (3204613530).

Almost surely, 2^61665960238 is an apocalyptic number.

61665960238 is a deficient number, since it is larger than the sum of its proper divisors (40881672722).

61665960238 is a wasteful number, since it uses less digits than its factorization.

61665960238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249452.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 61665960238 in words is "sixty-one billion, six hundred sixty-five million, nine hundred sixty thousand, two hundred thirty-eight".