2661004651 has 8 divisors (see below), whose sum is σ = 2694021120. Its totient is φ = 2628011112.

The previous prime is 2661004639. The next prime is 2661004667. The reversal of 2661004651 is 1564001662.

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

It is a cyclic number.

It is not a de Polignac number, because 2661004651 - 2³¹ = 513521003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661004631) 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, 421746 + ... + 428008.

It is an arithmetic number, because the mean of its divisors is an integer number (336752640).

Almost surely, 2^2661004651 is an apocalyptic number.

2661004651 is a deficient number, since it is larger than the sum of its proper divisors (33016469).

2661004651 is an equidigital number, since it uses as much as digits as its factorization.

2661004651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11465.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2661004651 is about 51584.9265871340. The cubic root of 2661004651 is about 1385.7403976541.

The spelling of 2661004651 in words is "two billion, six hundred sixty-one million, four thousand, six hundred fifty-one".