66347406 has 24 divisors (see below), whose sum is σ = 144406080. Its totient is φ = 22015296.

The previous prime is 66347381. The next prime is 66347431. The reversal of 66347406 is 60474366.

It is an interprime number because it is at equal distance from previous prime (66347381) and next prime (66347431).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4251 + ... + 12278.

It is an arithmetic number, because the mean of its divisors is an integer number (6016920).

Almost surely, 2^66347406 is an apocalyptic number.

66347406 is an abundant number, since it is smaller than the sum of its proper divisors (78058674).

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

66347406 is a wasteful number, since it uses less digits than its factorization.

66347406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16760 (or 16757 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The square root of 66347406 is about 8145.3917032884. The cubic root of 66347406 is about 404.8318277544.

The spelling of 66347406 in words is "sixty-six million, three hundred forty-seven thousand, four hundred six".