61966125378 has 24 divisors (see below), whose sum is σ = 134665570416. Its totient is φ = 20592970200.

The previous prime is 61966125337. The next prime is 61966125407. The reversal of 61966125378 is 87352166916.

61966125378 is a `hidden beast` number, since 6 + 1 + 96 + 6 + 12 + 537 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5194288 + ... + 5206203.

It is an arithmetic number, because the mean of its divisors is an integer number (5611065434).

Almost surely, 2^61966125378 is an apocalyptic number.

61966125378 is an abundant number, since it is smaller than the sum of its proper divisors (72699445038).

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

61966125378 is a wasteful number, since it uses less digits than its factorization.

61966125378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10400830 (or 10400827 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 61966125378 in words is "sixty-one billion, nine hundred sixty-six million, one hundred twenty-five thousand, three hundred seventy-eight".