66140495597 has 8 divisors (see below), whose sum is σ = 72166994112. Its totient is φ = 60116284800.

The previous prime is 66140495593. The next prime is 66140495621. The reversal of 66140495597 is 79559404166.

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

It is not a de Polignac number, because 66140495597 - 2² = 66140495593 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66140495593) 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, 511193 + ... + 627374.

It is an arithmetic number, because the mean of its divisors is an integer number (9020874264).

Almost surely, 2^66140495597 is an apocalyptic number.

It is an amenable number.

66140495597 is a deficient number, since it is larger than the sum of its proper divisors (6026498515).

66140495597 is a wasteful number, since it uses less digits than its factorization.

66140495597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143859.

The product of its (nonzero) digits is 8164800, while the sum is 56.

The spelling of 66140495597 in words is "sixty-six billion, one hundred forty million, four hundred ninety-five thousand, five hundred ninety-seven".