66990240331 has 8 divisors (see below), whose sum is σ = 76742131424. Its totient is φ = 57283813440.

The previous prime is 66990240319. The next prime is 66990240403. The reversal of 66990240331 is 13304209966.

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

It is not a de Polignac number, because 66990240331 - 2¹¹ = 66990238283 is a prime.

It is a super-2 number, since 2×66990240331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66990240301) 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, 11362890 + ... + 11368783.

It is an arithmetic number, because the mean of its divisors is an integer number (9592766428).

Almost surely, 2^66990240331 is an apocalyptic number.

66990240331 is a deficient number, since it is larger than the sum of its proper divisors (9751891093).

66990240331 is a wasteful number, since it uses less digits than its factorization.

66990240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22732101.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 66990240331 in words is "sixty-six billion, nine hundred ninety million, two hundred forty thousand, three hundred thirty-one".