61238399066 has 8 divisors (see below), whose sum is σ = 98923567764. Its totient is φ = 28263876480.

The previous prime is 61238399021. The next prime is 61238399069. The reversal of 61238399066 is 66099383216.

It can be written as a sum of positive squares in 2 ways, for example, as 53810544841 + 7427854225 = 231971^2 + 86185^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 61238398999 and 61238399017.

It is not an unprimeable number, because it can be changed into a prime (61238399069) 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, 1177661495 + ... + 1177661546.

Almost surely, 2^61238399066 is an apocalyptic number.

61238399066 is a deficient number, since it is larger than the sum of its proper divisors (37685168698).

61238399066 is a wasteful number, since it uses less digits than its factorization.

61238399066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355323056.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The spelling of 61238399066 in words is "sixty-one billion, two hundred thirty-eight million, three hundred ninety-nine thousand, sixty-six".