66774407437 has 8 divisors (see below), whose sum is σ = 67993178912. Its totient is φ = 65559639600.

The previous prime is 66774407363. The next prime is 66774407459. The reversal of 66774407437 is 73470447766.

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 66774407437 - 2¹⁵ = 66774374669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66774407477) 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, 967239 + ... + 1033972.

It is an arithmetic number, because the mean of its divisors is an integer number (8499147364).

Almost surely, 2^66774407437 is an apocalyptic number.

It is an amenable number.

66774407437 is a deficient number, since it is larger than the sum of its proper divisors (1218771475).

66774407437 is a wasteful number, since it uses less digits than its factorization.

66774407437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001819.

The product of its (nonzero) digits is 16595712, while the sum is 55.

The spelling of 66774407437 in words is "sixty-six billion, seven hundred seventy-four million, four hundred seven thousand, four hundred thirty-seven".