66254405 has 8 divisors (see below), whose sum is σ = 90863232. Its totient is φ = 45431568.

The previous prime is 66254341. The next prime is 66254407. The reversal of 66254405 is 50445266.

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

It is not a de Polignac number, because 66254405 - 2⁶ = 66254341 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 (66254407) 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, 946457 + ... + 946526.

It is an arithmetic number, because the mean of its divisors is an integer number (11357904).

Almost surely, 2^66254405 is an apocalyptic number.

It is an amenable number.

66254405 is a deficient number, since it is larger than the sum of its proper divisors (24608827).

66254405 is a wasteful number, since it uses less digits than its factorization.

66254405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892995.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 66254405 is about 8139.6808905509. The cubic root of 66254405 is about 404.6425846356.

The spelling of 66254405 in words is "sixty-six million, two hundred fifty-four thousand, four hundred five".