66620274254 has 16 divisors (see below), whose sum is σ = 105949601856. Its totient is φ = 31308960000.

The previous prime is 66620274239. The next prime is 66620274283. The reversal of 66620274254 is 45247202666.

It is a happy number.

66620274254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 1279007 + ... + 1330074.

It is an arithmetic number, because the mean of its divisors is an integer number (6621850116).

Almost surely, 2^66620274254 is an apocalyptic number.

66620274254 is a deficient number, since it is larger than the sum of its proper divisors (39329327602).

66620274254 is a wasteful number, since it uses less digits than its factorization.

66620274254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609851.

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 66620274254 in words is "sixty-six billion, six hundred twenty million, two hundred seventy-four thousand, two hundred fifty-four".