66054689 has 8 divisors (see below), whose sum is σ = 70096320. Its totient is φ = 62110576.

The previous prime is 66054671. The next prime is 66054701. The reversal of 66054689 is 98645066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66054689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66054619) 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, 22982 + ... + 25695.

It is an arithmetic number, because the mean of its divisors is an integer number (8762040).

Almost surely, 2^66054689 is an apocalyptic number.

It is an amenable number.

66054689 is a deficient number, since it is larger than the sum of its proper divisors (4041631).

66054689 is a wasteful number, since it uses less digits than its factorization.

66054689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48759.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 66054689 is about 8127.4035829409. The cubic root of 66054689 is about 404.2355931525.

The spelling of 66054689 in words is "sixty-six million, fifty-four thousand, six hundred eighty-nine".