66316702725 has 720 divisors, whose sum is σ = 168697774080. Its totient is φ = 25110259200.

The previous prime is 66316702693. The next prime is 66316702733. The reversal of 66316702725 is 52720761366.

66316702725 is a `hidden beast` number, since 6 + 631 + 6 + 7 + 0 + 2 + 7 + 2 + 5 = 666.

It is not a de Polignac number, because 66316702725 - 2⁵ = 66316702693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 719 ways as a sum of consecutive naturals, for example, 1410993652 + ... + 1410993698.

It is an arithmetic number, because the mean of its divisors is an integer number (234302464).

Almost surely, 2^66316702725 is an apocalyptic number.

66316702725 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66316702725 is an abundant number, since it is smaller than the sum of its proper divisors (102381071355).

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

66316702725 is a wasteful number, since it uses less digits than its factorization.

66316702725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 66316702725 in words is "sixty-six billion, three hundred sixteen million, seven hundred two thousand, seven hundred twenty-five".