66140901 has 8 divisors (see below), whose sum is σ = 97986560. Its totient is φ = 44093916.

The previous prime is 66140857. The next prime is 66140911. The reversal of 66140901 is 10904166.

It is not a de Polignac number, because 66140901 - 2⁷ = 66140773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2449663 = 66140901 / (6 + 6 + 1 + 4 + 0 + 9 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66140911) 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, 1224805 + ... + 1224858.

It is an arithmetic number, because the mean of its divisors is an integer number (12248320).

Almost surely, 2^66140901 is an apocalyptic number.

It is an amenable number.

66140901 is a deficient number, since it is larger than the sum of its proper divisors (31845659).

66140901 is a wasteful number, since it uses less digits than its factorization.

66140901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449672 (or 2449666 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 66140901 is about 8132.7056383469. The cubic root of 66140901 is about 404.4113808665.

The spelling of 66140901 in words is "sixty-six million, one hundred forty thousand, nine hundred one".