66772161254 has 16 divisors (see below), whose sum is σ = 102308368896. Its totient is φ = 32669637000.

The previous prime is 66772161233. The next prime is 66772161283. The reversal of 66772161254 is 45216127766.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 66772161199 and 66772161208.

It is a congruent number.

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, 462029 + ... + 589079.

It is an arithmetic number, because the mean of its divisors is an integer number (6394273056).

Almost surely, 2^66772161254 is an apocalyptic number.

66772161254 is a deficient number, since it is larger than the sum of its proper divisors (35536207642).

66772161254 is a wasteful number, since it uses less digits than its factorization.

66772161254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132691.

The product of its digits is 846720, while the sum is 47.

The spelling of 66772161254 in words is "sixty-six billion, seven hundred seventy-two million, one hundred sixty-one thousand, two hundred fifty-four".