66453461 has 4 divisors (see below), whose sum is σ = 67542924. Its totient is φ = 65364000.

The previous prime is 66453451. The next prime is 66453473. The reversal of 66453461 is 16435466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20295025 + 46158436 = 4505^2 + 6794^2 .

It is a cyclic number.

It is not a de Polignac number, because 66453461 - 2⁶ = 66453397 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66453421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544640 + ... + 544761.

It is an arithmetic number, because the mean of its divisors is an integer number (16885731).

Almost surely, 2^66453461 is an apocalyptic number.

66453461 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66453461 is a deficient number, since it is larger than the sum of its proper divisors (1089463).

66453461 is a wasteful number, since it uses less digits than its factorization.

66453461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089462.

The product of its digits is 51840, while the sum is 35.

The square root of 66453461 is about 8151.8992265606. The cubic root of 66453461 is about 405.0474181131.

The spelling of 66453461 in words is "sixty-six million, four hundred fifty-three thousand, four hundred sixty-one".