66735906 has 16 divisors (see below), whose sum is σ = 133563648. Its totient is φ = 22230000.

The previous prime is 66735887. The next prime is 66735913. The reversal of 66735906 is 60953766.

It is a super-2 number, since 2×66735906² = 8907362299281672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8856 + ... + 14556.

It is an arithmetic number, because the mean of its divisors is an integer number (8347728).

Almost surely, 2^66735906 is an apocalyptic number.

66735906 is an abundant number, since it is smaller than the sum of its proper divisors (66827742).

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

66735906 is a wasteful number, since it uses less digits than its factorization.

66735906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7657.

The product of its (nonzero) digits is 204120, while the sum is 42.

The square root of 66735906 is about 8169.2047348564. The cubic root of 66735906 is about 405.6204603390.

The spelling of 66735906 in words is "sixty-six million, seven hundred thirty-five thousand, nine hundred six".