66263420155 has 8 divisors (see below), whose sum is σ = 79745259312. Its totient is φ = 52857966048.

The previous prime is 66263420143. The next prime is 66263420159. The reversal of 66263420155 is 55102436266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66263420155 - 2⁹ = 66263419643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66263420159) 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, 19094352 + ... + 19097821.

It is an arithmetic number, because the mean of its divisors is an integer number (9968157414).

Almost surely, 2^66263420155 is an apocalyptic number.

66263420155 is a deficient number, since it is larger than the sum of its proper divisors (13481839157).

66263420155 is a wasteful number, since it uses less digits than its factorization.

66263420155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38192525.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 66263420155 in words is "sixty-six billion, two hundred sixty-three million, four hundred twenty thousand, one hundred fifty-five".