66154055 has 16 divisors (see below), whose sum is σ = 91697184. Its totient is φ = 45281280.

The previous prime is 66154027. The next prime is 66154061. The reversal of 66154055 is 55045166.

It is a de Polignac number, because none of the positive numbers 2^k-66154055 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34442 + ... + 36311.

It is an arithmetic number, because the mean of its divisors is an integer number (5731074).

Almost surely, 2^66154055 is an apocalyptic number.

66154055 is a deficient number, since it is larger than the sum of its proper divisors (25543129).

66154055 is a wasteful number, since it uses less digits than its factorization.

66154055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70786.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 66154055 is about 8133.5143080959. The cubic root of 66154055 is about 404.4381886592.

Subtracting from 66154055 its reverse (55045166), we obtain a square (11108889 = 3333²).

The spelling of 66154055 in words is "sixty-six million, one hundred fifty-four thousand, fifty-five".