61866764336 has 20 divisors (see below), whose sum is σ = 129087383712. Its totient is φ = 28553891136.

The previous prime is 61866764303. The next prime is 61866764339. The reversal of 61866764336 is 63346766816.

61866764336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61866764339) 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, 148717976 + ... + 148718391.

Almost surely, 2^61866764336 is an apocalyptic number.

It is an amenable number.

61866764336 is an abundant number, since it is smaller than the sum of its proper divisors (67220619376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61866764336 is a wasteful number, since it uses less digits than its factorization.

61866764336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297436388 (or 297436382 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 56.

The spelling of 61866764336 in words is "sixty-one billion, eight hundred sixty-six million, seven hundred sixty-four thousand, three hundred thirty-six".