66661454 has 8 divisors (see below), whose sum is σ = 105874128. Its totient is φ = 31370080.

The previous prime is 66661447. The next prime is 66661487. The reversal of 66661454 is 45416666.

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, 980282 + ... + 980349.

It is an arithmetic number, because the mean of its divisors is an integer number (13234266).

Almost surely, 2^66661454 is an apocalyptic number.

66661454 is a deficient number, since it is larger than the sum of its proper divisors (39212674).

66661454 is a wasteful number, since it uses less digits than its factorization.

66661454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960650.

The product of its digits is 103680, while the sum is 38.

The square root of 66661454 is about 8164.6465936990. The cubic root of 66661454 is about 405.4695645989.

The spelling of 66661454 in words is "sixty-six million, six hundred sixty-one thousand, four hundred fifty-four".