65554677078 has 64 divisors (see below), whose sum is σ = 150796615680. Its totient is φ = 18789472800.

The previous prime is 65554677077. The next prime is 65554677091. The reversal of 65554677078 is 87077645556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65554677077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749851 + ... + 832697.

It is an arithmetic number, because the mean of its divisors is an integer number (2356197120).

Almost surely, 2^65554677078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65554677078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75398307840).

65554677078 is an abundant number, since it is smaller than the sum of its proper divisors (85241938602).

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

65554677078 is a wasteful number, since it uses less digits than its factorization.

65554677078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83513.

The product of its (nonzero) digits is 49392000, while the sum is 60.

The spelling of 65554677078 in words is "sixty-five billion, five hundred fifty-four million, six hundred seventy-seven thousand, seventy-eight".