66972291474 has 64 divisors (see below), whose sum is σ = 155665359360. Its totient is φ = 18994821120.

The previous prime is 66972291461. The next prime is 66972291497. The reversal of 66972291474 is 47419227966.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217647 + ... + 425810.

It is an arithmetic number, because the mean of its divisors is an integer number (2432271240).

Almost surely, 2^66972291474 is an apocalyptic number.

66972291474 is an abundant number, since it is smaller than the sum of its proper divisors (88693067886).

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

66972291474 is a wasteful number, since it uses less digits than its factorization.

66972291474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643575.

The product of its digits is 9144576, while the sum is 57.

The spelling of 66972291474 in words is "sixty-six billion, nine hundred seventy-two million, two hundred ninety-one thousand, four hundred seventy-four".