61651166607 has 16 divisors (see below), whose sum is σ = 91813263360. Its totient is φ = 40885587000.

The previous prime is 61651166581. The next prime is 61651166651. The reversal of 61651166607 is 70666115616.

It is not a de Polignac number, because 61651166607 - 2²⁴ = 61634389391 is a prime.

It is a super-3 number, since 3×61651166607³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61651166657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5972269 + ... + 5982582.

It is an arithmetic number, because the mean of its divisors is an integer number (5738328960).

Almost surely, 2^61651166607 is an apocalyptic number.

61651166607 is a deficient number, since it is larger than the sum of its proper divisors (30162096753).

61651166607 is a wasteful number, since it uses less digits than its factorization.

61651166607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11955051 (or 11955045 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 61651166607 in words is "sixty-one billion, six hundred fifty-one million, one hundred sixty-six thousand, six hundred seven".