61660431476625 has 16 divisors (see below), whose sum is σ = 102602957977728. Its totient is φ = 32885563454000.

The previous prime is 61660431476617. The next prime is 61660431476641. The reversal of 61660431476625 is 52667413406616.

It is a happy number.

It is not a de Polignac number, because 61660431476625 - 2³ = 61660431476617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82213908261 + ... + 82213909010.

It is an arithmetic number, because the mean of its divisors is an integer number (6412684873608).

Almost surely, 2^{61660431476625} is an apocalyptic number.

It is an amenable number.

61660431476625 is a deficient number, since it is larger than the sum of its proper divisors (40942526501103).

61660431476625 is a wasteful number, since it uses less digits than its factorization.

61660431476625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164427817289 (or 164427817279 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 57.

The spelling of 61660431476625 in words is "sixty-one trillion, six hundred sixty billion, four hundred thirty-one million, four hundred seventy-six thousand, six hundred twenty-five".