66072455 has 16 divisors (see below), whose sum is σ = 85333824. Its totient is φ = 48929280.

The previous prime is 66072451. The next prime is 66072463. The reversal of 66072455 is 55427066.

It is not a de Polignac number, because 66072455 - 2² = 66072451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66072451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1187 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (5333364).

Almost surely, 2^66072455 is an apocalyptic number.

66072455 is a deficient number, since it is larger than the sum of its proper divisors (19261369).

66072455 is a wasteful number, since it uses less digits than its factorization.

66072455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 66072455 is about 8128.4964784393. The cubic root of 66072455 is about 404.2718308311.

The spelling of 66072455 in words is "sixty-six million, seventy-two thousand, four hundred fifty-five".