66261706 has 8 divisors (see below), whose sum is σ = 113591520. Its totient is φ = 28397868.

The previous prime is 66261653. The next prime is 66261719. The reversal of 66261706 is 60716266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66261706² = 8781227364060872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366476 + ... + 2366503.

It is an arithmetic number, because the mean of its divisors is an integer number (14198940).

Almost surely, 2^66261706 is an apocalyptic number.

66261706 is a deficient number, since it is larger than the sum of its proper divisors (47329814).

66261706 is a wasteful number, since it uses less digits than its factorization.

66261706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732988.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66261706 is about 8140.1293601515. The cubic root of 66261706 is about 404.6574474814.

The spelling of 66261706 in words is "sixty-six million, two hundred sixty-one thousand, seven hundred six".