66909254 has 8 divisors (see below), whose sum is σ = 104727600. Its totient is φ = 32000056.

The previous prime is 66909239. The next prime is 66909281. The reversal of 66909254 is 45290966.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727229 + ... + 727320.

It is an arithmetic number, because the mean of its divisors is an integer number (13090950).

Almost surely, 2^66909254 is an apocalyptic number.

66909254 is a deficient number, since it is larger than the sum of its proper divisors (37818346).

66909254 is a wasteful number, since it uses less digits than its factorization.

66909254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454574.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 66909254 is about 8179.8076994511. The cubic root of 66909254 is about 405.9713594136.

The spelling of 66909254 in words is "sixty-six million, nine hundred nine thousand, two hundred fifty-four".