65949267780 has 144 divisors (see below), whose sum is σ = 218708538048. Its totient is φ = 15952800000.

The previous prime is 65949267763. The next prime is 65949267803. The reversal of 65949267780 is 8776294956.

65949267780 is a `hidden beast` number, since 6 + 5 + 9 + 492 + 67 + 7 + 80 = 666.

It is a super-2 number, since 2×65949267780² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 876655 + ... + 948905.

It is an arithmetic number, because the mean of its divisors is an integer number (1518809292).

Almost surely, 2^65949267780 is an apocalyptic number.

65949267780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65949267780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109354269024).

65949267780 is an abundant number, since it is smaller than the sum of its proper divisors (152759270268).

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

65949267780 is a wasteful number, since it uses less digits than its factorization.

65949267780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72738 (or 72733 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 65949267780 in words is "sixty-five billion, nine hundred forty-nine million, two hundred sixty-seven thousand, seven hundred eighty".