66501715374 has 12 divisors (see below), whose sum is σ = 144087050016. Its totient is φ = 22167238452.

The previous prime is 66501715333. The next prime is 66501715381. The reversal of 66501715374 is 47351710566.

66501715374 is a `hidden beast` number, since 6 + 6 + 501 + 71 + 5 + 3 + 74 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1847269854 + ... + 1847269889.

It is an arithmetic number, because the mean of its divisors is an integer number (12007254168).

Almost surely, 2^66501715374 is an apocalyptic number.

66501715374 is an abundant number, since it is smaller than the sum of its proper divisors (77585334642).

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

66501715374 is a wasteful number, since it uses less digits than its factorization.

66501715374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694539751 (or 3694539748 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

It can be divided in two parts, 66501 and 715374, that added together give a triangular number (781875 = T₁₂₅₀).

The spelling of 66501715374 in words is "sixty-six billion, five hundred one million, seven hundred fifteen thousand, three hundred seventy-four".