66477439626 has 32 divisors (see below), whose sum is σ = 149407493760. Its totient is φ = 19565265984.

The previous prime is 66477439619. The next prime is 66477439627. The reversal of 66477439626 is 62693477466.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66477439626.

It is not an unprimeable number, because it can be changed into a prime (66477439627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18525921 + ... + 18529508.

It is an arithmetic number, because the mean of its divisors is an integer number (4668984180).

Almost surely, 2^66477439626 is an apocalyptic number.

66477439626 is an abundant number, since it is smaller than the sum of its proper divisors (82930054134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66477439626 is a wasteful number, since it uses less digits than its factorization.

66477439626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37055470.

The product of its digits is 54867456, while the sum is 60.

The spelling of 66477439626 in words is "sixty-six billion, four hundred seventy-seven million, four hundred thirty-nine thousand, six hundred twenty-six".