66515116151487 has 8 divisors (see below), whose sum is σ = 88768410151936. Its totient is φ = 44302616459352.

The previous prime is 66515116151479. The next prime is 66515116151489. The reversal of 66515116151487 is 78415161151566.

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

It is not a de Polignac number, because 66515116151487 - 2³ = 66515116151479 is a prime.

It is a super-2 number, since 2×66515116151487² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66515116151489) 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, 10198573273 + ... + 10198579794.

It is an arithmetic number, because the mean of its divisors is an integer number (11096051268992).

Almost surely, 2^{66515116151487} is an apocalyptic number.

66515116151487 is a deficient number, since it is larger than the sum of its proper divisors (22253294000449).

66515116151487 is a wasteful number, since it uses less digits than its factorization.

66515116151487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20397154157.

The product of its digits is 6048000, while the sum is 57.

The spelling of 66515116151487 in words is "sixty-six trillion, five hundred fifteen billion, one hundred sixteen million, one hundred fifty-one thousand, four hundred eighty-seven".