66291451 has 8 divisors (see below), whose sum is σ = 69861024. Its totient is φ = 62779200.

The previous prime is 66291443. The next prime is 66291469. The reversal of 66291451 is 15419266.

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

It is a cyclic number.

It is not a de Polignac number, because 66291451 - 2³ = 66291443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66294451) 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, 11946 + ... + 16591.

It is an arithmetic number, because the mean of its divisors is an integer number (8732628).

Almost surely, 2^66291451 is an apocalyptic number.

66291451 is a deficient number, since it is larger than the sum of its proper divisors (3569573).

66291451 is a wasteful number, since it uses less digits than its factorization.

66291451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28661.

The product of its digits is 12960, while the sum is 34.

The square root of 66291451 is about 8141.9562145715. The cubic root of 66291451 is about 404.7179889106.

The spelling of 66291451 in words is "sixty-six million, two hundred ninety-one thousand, four hundred fifty-one".