66261498 has 16 divisors (see below), whose sum is σ = 132844320. Its totient is φ = 22033616.

The previous prime is 66261469. The next prime is 66261499. The reversal of 66261498 is 89416266.

It is a super-2 number, since 2×66261498² = 8781172234408008, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66261499) 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, 10665 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (8302770).

Almost surely, 2^66261498 is an apocalyptic number.

66261498 is an abundant number, since it is smaller than the sum of its proper divisors (66582822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66261498 is a wasteful number, since it uses less digits than its factorization.

66261498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26781.

The product of its digits is 124416, while the sum is 42.

The square root of 66261498 is about 8140.1165839317. The cubic root of 66261498 is about 404.6570240652.

The spelling of 66261498 in words is "sixty-six million, two hundred sixty-one thousand, four hundred ninety-eight".