1345722660 has 60 divisors (see below), whose sum is σ = 4221586908. Its totient is φ = 358858944.

The previous prime is 1345722593. The next prime is 1345722667. The reversal of 1345722660 is 662275431.

1345722660 is a `hidden beast` number, since 1 + 3 + 4 + 572 + 26 + 60 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 444282084 + 901440576 = 21078^2 + 30024^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1345722667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 413727 + ... + 416966.

Almost surely, 2^1345722660 is an apocalyptic number.

1345722660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345722660 is an abundant number, since it is smaller than the sum of its proper divisors (2875864248).

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

1345722660 is a wasteful number, since it uses less digits than its factorization.

1345722660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830714 (or 830703 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 1345722660 is about 36684.0927378612. The cubic root of 1345722660 is about 1104.0409661075.

The spelling of 1345722660 in words is "one billion, three hundred forty-five million, seven hundred twenty-two thousand, six hundred sixty".