66421101405 has 8 divisors (see below), whose sum is σ = 106273762272. Its totient is φ = 35424587408.

The previous prime is 66421101401. The next prime is 66421101469. The reversal of 66421101405 is 50410112466.

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

It is a cyclic number.

It is not a de Polignac number, because 66421101405 - 2² = 66421101401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66421101401) 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, 2214036699 + ... + 2214036728.

It is an arithmetic number, because the mean of its divisors is an integer number (13284220284).

Almost surely, 2^66421101405 is an apocalyptic number.

It is an amenable number.

66421101405 is a deficient number, since it is larger than the sum of its proper divisors (39852660867).

66421101405 is a wasteful number, since it uses less digits than its factorization.

66421101405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428073435.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 66421101405 in words is "sixty-six billion, four hundred twenty-one million, one hundred one thousand, four hundred five".