66999301121 has 8 divisors (see below), whose sum is σ = 68291536104. Its totient is φ = 65708106880.

The previous prime is 66999301073. The next prime is 66999301153. The reversal of 66999301121 is 12110399966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1777802896 + 65221498225 = 42164^2 + 255385^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66999301121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66999304121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129566 + ... + 388311.

It is an arithmetic number, because the mean of its divisors is an integer number (8536442013).

Almost surely, 2^66999301121 is an apocalyptic number.

It is an amenable number.

66999301121 is a deficient number, since it is larger than the sum of its proper divisors (1292234983).

66999301121 is a wasteful number, since it uses less digits than its factorization.

66999301121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520371.

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 66999301121 in words is "sixty-six billion, nine hundred ninety-nine million, three hundred one thousand, one hundred twenty-one".