66499051 has 2 divisors, whose sum is σ = 66499052. Its totient is φ = 66499050.

The previous prime is 66499039. The next prime is 66499067. The reversal of 66499051 is 15099466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66499051 - 2⁷ = 66498923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66498995 and 66499013.

It is not a weakly prime, because it can be changed into another prime (66499651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33249525 + 33249526.

It is an arithmetic number, because the mean of its divisors is an integer number (33249526).

Almost surely, 2^66499051 is an apocalyptic number.

66499051 is a deficient number, since it is larger than the sum of its proper divisors (1).

66499051 is an equidigital number, since it uses as much as digits as its factorization.

66499051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 66499051 is about 8154.6950280191. The cubic root of 66499051 is about 405.1400237264.

The spelling of 66499051 in words is "sixty-six million, four hundred ninety-nine thousand, fifty-one".