61660769783 has 8 divisors (see below), whose sum is σ = 62369054160. Its totient is φ = 60953967360.

The previous prime is 61660769747. The next prime is 61660769809. The reversal of 61660769783 is 38796706616.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61660769783 - 2⁶ = 61660769719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61660769743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286688 + ... + 453333.

It is an arithmetic number, because the mean of its divisors is an integer number (7796131770).

Almost surely, 2^61660769783 is an apocalyptic number.

61660769783 is a deficient number, since it is larger than the sum of its proper divisors (708284377).

61660769783 is an equidigital number, since it uses as much as digits as its factorization.

61660769783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740977.

The product of its (nonzero) digits is 13716864, while the sum is 59.

The spelling of 61660769783 in words is "sixty-one billion, six hundred sixty million, seven hundred sixty-nine thousand, seven hundred eighty-three".