6610551661506 has 32 divisors (see below), whose sum is σ = 14242548741120. Its totient is φ = 2033381971584.

The previous prime is 6610551661499. The next prime is 6610551661543. The reversal of 6610551661506 is 6051661550166.

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, 12954850 + ... + 13455453.

It is an arithmetic number, because the mean of its divisors is an integer number (445079648160).

Almost surely, 2^{6610551661506} is an apocalyptic number.

6610551661506 is an abundant number, since it is smaller than the sum of its proper divisors (7631997079614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6610551661506 is a wasteful number, since it uses less digits than its factorization.

6610551661506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26413530.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 6610551661506 in words is "six trillion, six hundred ten billion, five hundred fifty-one million, six hundred sixty-one thousand, five hundred six".