40661026651 has 8 divisors (see below), whose sum is σ = 47968769024. Its totient is φ = 33728040360.

The previous prime is 40661026639. The next prime is 40661026697. The reversal of 40661026651 is 15662016604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40661026651 - 2⁵ = 40661026619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40661026651.

It is not an unprimeable number, because it can be changed into a prime (40661026151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93688785 + ... + 93689218.

It is an arithmetic number, because the mean of its divisors is an integer number (5996096128).

Almost surely, 2^40661026651 is an apocalyptic number.

40661026651 is a deficient number, since it is larger than the sum of its proper divisors (7307742373).

40661026651 is a wasteful number, since it uses less digits than its factorization.

40661026651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187378041.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 40661026651 in words is "forty billion, six hundred sixty-one million, twenty-six thousand, six hundred fifty-one".