66498623 has 8 divisors (see below), whose sum is σ = 68061600. Its totient is φ = 64947168.

The previous prime is 66498617. The next prime is 66498629. The reversal of 66498623 is 32689466.

It is an interprime number because it is at equal distance from previous prime (66498617) and next prime (66498629).

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 66498623 - 2²⁴ = 49721407 is a prime.

It is a super-2 number, since 2×66498623² = 8844133721792258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66498629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9398 + ... + 14876.

It is an arithmetic number, because the mean of its divisors is an integer number (8507700).

Almost surely, 2^66498623 is an apocalyptic number.

66498623 is a deficient number, since it is larger than the sum of its proper divisors (1562977).

66498623 is a wasteful number, since it uses less digits than its factorization.

66498623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761.

The product of its digits is 373248, while the sum is 44.

The square root of 66498623 is about 8154.6687854259. The cubic root of 66498623 is about 405.1391545396.

The spelling of 66498623 in words is "sixty-six million, four hundred ninety-eight thousand, six hundred twenty-three".