66526461 has 16 divisors (see below), whose sum is σ = 100851520. Its totient is φ = 43318800.

The previous prime is 66526459. The next prime is 66526463. The reversal of 66526461 is 16462566.

It is a happy number.

66526461 is a `hidden beast` number, since 6 + 6 + 5 + 2 + 646 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (66526459) and next prime (66526463).

It is not a de Polignac number, because 66526461 - 2¹ = 66526459 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66526463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27490 + ... + 29811.

It is an arithmetic number, because the mean of its divisors is an integer number (6303220).

Almost surely, 2^66526461 is an apocalyptic number.

It is an amenable number.

66526461 is a deficient number, since it is larger than the sum of its proper divisors (34325059).

66526461 is a wasteful number, since it uses less digits than its factorization.

66526461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57353 (or 57347 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66526461 is about 8156.3754817934. The cubic root of 66526461 is about 405.1956804738.

The spelling of 66526461 in words is "sixty-six million, five hundred twenty-six thousand, four hundred sixty-one".