66432431266 has 16 divisors (see below), whose sum is σ = 103402208448. Its totient is φ = 31986788400.

The previous prime is 66432431257. The next prime is 66432431327. The reversal of 66432431266 is 66213423466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5433825 + ... + 5446036.

It is an arithmetic number, because the mean of its divisors is an integer number (6462638028).

Almost surely, 2^66432431266 is an apocalyptic number.

66432431266 is a deficient number, since it is larger than the sum of its proper divisors (36969777182).

66432431266 is a wasteful number, since it uses less digits than its factorization.

66432431266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10879977.

The product of its digits is 746496, while the sum is 43.

The spelling of 66432431266 in words is "sixty-six billion, four hundred thirty-two million, four hundred thirty-one thousand, two hundred sixty-six".