1371420066557 has 32 divisors (see below), whose sum is σ = 1545057360000. Its totient is φ = 1209619132416.

The previous prime is 1371420066503. The next prime is 1371420066587. The reversal of 1371420066557 is 7556600241731.

It is not a de Polignac number, because 1371420066557 - 2⁶ = 1371420066493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371420066587) 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, 21761669 + ... + 21824597.

It is an arithmetic number, because the mean of its divisors is an integer number (48283042500).

Almost surely, 2^{1371420066557} is an apocalyptic number.

1371420066557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1371420066557 is a deficient number, since it is larger than the sum of its proper divisors (173637293443).

1371420066557 is a wasteful number, since it uses less digits than its factorization.

1371420066557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63693.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 1371420066557 in words is "one trillion, three hundred seventy-one billion, four hundred twenty million, sixty-six thousand, five hundred fifty-seven".