66807407474 has 8 divisors (see below), whose sum is σ = 103666666860. Its totient is φ = 32251851856.

The previous prime is 66807407473. The next prime is 66807407489. The reversal of 66807407474 is 47470470866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56798805625 + 10008601849 = 238325^2 + 100043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66807407473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575925869 + ... + 575925984.

Almost surely, 2^66807407474 is an apocalyptic number.

66807407474 is a deficient number, since it is larger than the sum of its proper divisors (36859259386).

66807407474 is a wasteful number, since it uses less digits than its factorization.

66807407474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151851884.

The product of its (nonzero) digits is 6322176, while the sum is 53.

The spelling of 66807407474 in words is "sixty-six billion, eight hundred seven million, four hundred seven thousand, four hundred seventy-four".