660651151515 has 16 divisors (see below), whose sum is σ = 1058549764896. Its totient is φ = 351844640000.

The previous prime is 660651151493. The next prime is 660651151529. The reversal of 660651151515 is 515151156066.

It is not a de Polignac number, because 660651151515 - 2⁶ = 660651151451 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31404186 + ... + 31425215.

It is an arithmetic number, because the mean of its divisors is an integer number (66159360306).

Almost surely, 2^660651151515 is an apocalyptic number.

660651151515 is a deficient number, since it is larger than the sum of its proper divisors (397898613381).

660651151515 is a wasteful number, since it uses less digits than its factorization.

660651151515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62830110.

The product of its (nonzero) digits is 135000, while the sum is 42.

It can be divided in two parts, 66065 and 1151515, that added together give a triangular number (1217580 = T₁₅₆₀).

The spelling of 660651151515 in words is "six hundred sixty billion, six hundred fifty-one million, one hundred fifty-one thousand, five hundred fifteen".