2661407455 has 32 divisors (see below), whose sum is σ = 3744144000. Its totient is φ = 1778330112.

The previous prime is 2661407453. The next prime is 2661407513. The reversal of 2661407455 is 5547041662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2661407455 - 2¹ = 2661407453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661407453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271581 + ... + 281209.

It is an arithmetic number, because the mean of its divisors is an integer number (117004500).

Almost surely, 2^2661407455 is an apocalyptic number.

2661407455 is a deficient number, since it is larger than the sum of its proper divisors (1082736545).

2661407455 is a wasteful number, since it uses less digits than its factorization.

2661407455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9843.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 2661407455 is about 51588.8307194493. The cubic root of 2661407455 is about 1385.8103153088.

The spelling of 2661407455 in words is "two billion, six hundred sixty-one million, four hundred seven thousand, four hundred fifty-five".