66427885437 has 8 divisors (see below), whose sum is σ = 90241655904. Its totient is φ = 43449685968.

The previous prime is 66427885429. The next prime is 66427885477. The reversal of 66427885437 is 73458872466.

It is a happy number.

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

It is not a de Polignac number, because 66427885437 - 2³ = 66427885429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66427885477) 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, 208892563 + ... + 208892880.

It is an arithmetic number, because the mean of its divisors is an integer number (11280206988).

Almost surely, 2^66427885437 is an apocalyptic number.

It is an amenable number.

66427885437 is a deficient number, since it is larger than the sum of its proper divisors (23813770467).

66427885437 is a wasteful number, since it uses less digits than its factorization.

66427885437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417785499.

The product of its digits is 54190080, while the sum is 60.

The spelling of 66427885437 in words is "sixty-six billion, four hundred twenty-seven million, eight hundred eighty-five thousand, four hundred thirty-seven".