66799260 has 108 divisors (see below), whose sum is σ = 222792024. Its totient is φ = 16188480.

The previous prime is 66799247. The next prime is 66799277. The reversal of 66799260 is 6299766.

It is a super-2 number, since 2×66799260² = 8924282273095200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20247 + ... + 23313.

Almost surely, 2^66799260 is an apocalyptic number.

66799260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66799260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111396012).

66799260 is an abundant number, since it is smaller than the sum of its proper divisors (155992764).

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

66799260 is a wasteful number, since it uses less digits than its factorization.

66799260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 66799260 is about 8173.0814262431. The cubic root of 66799260 is about 405.7487748285.

The spelling of 66799260 in words is "sixty-six million, seven hundred ninety-nine thousand, two hundred sixty".