66901018 has 16 divisors (see below), whose sum is σ = 107999784. Its totient is φ = 30965760.

The previous prime is 66901013. The next prime is 66901031. The reversal of 66901018 is 81010966.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40921609 + 25979409 = 6397^2 + 5097^2 .

It is a super-3 number, since 3×66901018³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66901013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14055 + ... + 18202.

Almost surely, 2^66901018 is an apocalyptic number.

66901018 is a deficient number, since it is larger than the sum of its proper divisors (41098766).

66901018 is a wasteful number, since it uses less digits than its factorization.

66901018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32337.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 66901018 is about 8179.3042491400. The cubic root of 66901018 is about 405.9547014423.

The spelling of 66901018 in words is "sixty-six million, nine hundred one thousand, eighteen".