66450131 has 8 divisors (see below), whose sum is σ = 73573824. Its totient is φ = 59506920.

The previous prime is 66450101. The next prime is 66450149. The reversal of 66450131 is 13105466.

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

It is not a de Polignac number, because 66450131 - 2⁶ = 66450067 is a prime.

It is a super-2 number, since 2×66450131² = 8831239819834322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66450131.

It is not an unprimeable number, because it can be changed into a prime (66450101) 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, 44345 + ... + 45818.

It is an arithmetic number, because the mean of its divisors is an integer number (9196728).

Almost surely, 2^66450131 is an apocalyptic number.

66450131 is a deficient number, since it is larger than the sum of its proper divisors (7123693).

66450131 is a wasteful number, since it uses less digits than its factorization.

66450131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90241.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 66450131 is about 8151.6949771198. The cubic root of 66450131 is about 405.0406523233.

Adding to 66450131 its reverse (13105466), we get a palindrome (79555597).

The spelling of 66450131 in words is "sixty-six million, four hundred fifty thousand, one hundred thirty-one".