6665661016510 has 32 divisors (see below), whose sum is σ = 12050647836480. Its totient is φ = 2654631187968.

The previous prime is 6665661016477. The next prime is 6665661016541. The reversal of 6665661016510 is 156101665666.

It is a super-2 number, since 2×6665661016510² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

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, 705111 + ... + 3718669.

It is an arithmetic number, because the mean of its divisors is an integer number (376582744890).

Almost surely, 2^{6665661016510} is an apocalyptic number.

6665661016510 is a deficient number, since it is larger than the sum of its proper divisors (5384986819970).

6665661016510 is a wasteful number, since it uses less digits than its factorization.

6665661016510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014532.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 6665661016510 in words is "six trillion, six hundred sixty-five billion, six hundred sixty-one million, sixteen thousand, five hundred ten".