66345954 has 32 divisors (see below), whose sum is σ = 136551744. Its totient is φ = 21477120.

The previous prime is 66345953. The next prime is 66345959. The reversal of 66345954 is 45954366.

It is a super-2 number, since 2×66345954² = 8803571224340232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66345953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69142 + ... + 70094.

It is an arithmetic number, because the mean of its divisors is an integer number (4267242).

Almost surely, 2^66345954 is an apocalyptic number.

66345954 is an abundant number, since it is smaller than the sum of its proper divisors (70205790).

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

66345954 is a wasteful number, since it uses less digits than its factorization.

66345954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its digits is 388800, while the sum is 42.

The square root of 66345954 is about 8145.3025726489. The cubic root of 66345954 is about 404.8288745111.

The spelling of 66345954 in words is "sixty-six million, three hundred forty-five thousand, nine hundred fifty-four".