66054451 has 4 divisors (see below), whose sum is σ = 66085552. Its totient is φ = 66023352.

The previous prime is 66054449. The next prime is 66054467. The reversal of 66054451 is 15445066.

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

It is a cyclic number.

It is not a de Polignac number, because 66054451 - 2¹ = 66054449 is a prime.

It is a super-2 number, since 2×66054451² = 8726380993822802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66054491) 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, 12111 + ... + 16696.

It is an arithmetic number, because the mean of its divisors is an integer number (16521388).

Almost surely, 2^66054451 is an apocalyptic number.

66054451 is a deficient number, since it is larger than the sum of its proper divisors (31101).

66054451 is a wasteful number, since it uses less digits than its factorization.

66054451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31100.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 66054451 is about 8127.3889411053. The cubic root of 66054451 is about 404.2351076548.

The spelling of 66054451 in words is "sixty-six million, fifty-four thousand, four hundred fifty-one".