61372542666 has 8 divisors (see below), whose sum is σ = 122745085344. Its totient is φ = 20457514220.

The previous prime is 61372542611. The next prime is 61372542667. The reversal of 61372542666 is 66624527316.

61372542666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

61372542666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (61372542667) 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, 5114378550 + ... + 5114378561.

It is an arithmetic number, because the mean of its divisors is an integer number (15343135668).

Almost surely, 2^61372542666 is an apocalyptic number.

61372542666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61372542666 is a wasteful number, since it uses less digits than its factorization.

61372542666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228757116.

The product of its digits is 2177280, while the sum is 48.

The spelling of 61372542666 in words is "sixty-one billion, three hundred seventy-two million, five hundred forty-two thousand, six hundred sixty-six".