66124556015 has 24 divisors (see below), whose sum is σ = 93817691712. Its totient is φ = 44599222080.

The previous prime is 66124556011. The next prime is 66124556081. The reversal of 66124556015 is 51065542166.

It is not a de Polignac number, because 66124556015 - 2² = 66124556011 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 (66124556011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2197319 + ... + 2227208.

It is an arithmetic number, because the mean of its divisors is an integer number (3909070488).

Almost surely, 2^66124556015 is an apocalyptic number.

66124556015 is a deficient number, since it is larger than the sum of its proper divisors (27693135697).

66124556015 is a wasteful number, since it uses less digits than its factorization.

66124556015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424607 (or 4424600 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 66124556015 in words is "sixty-six billion, one hundred twenty-four million, five hundred fifty-six thousand, fifteen".