66265121455 has 16 divisors (see below), whose sum is σ = 85720902624. Its totient is φ = 48885114240.

The previous prime is 66265121441. The next prime is 66265121501. The reversal of 66265121455 is 55412156266.

It is not a de Polignac number, because 66265121455 - 2⁷ = 66265121327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446461 + ... + 576070.

It is an arithmetic number, because the mean of its divisors is an integer number (5357556414).

Almost surely, 2^66265121455 is an apocalyptic number.

66265121455 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66265121455 is a deficient number, since it is larger than the sum of its proper divisors (19455781169).

66265121455 is a wasteful number, since it uses less digits than its factorization.

66265121455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023546.

The product of its digits is 432000, while the sum is 43.

The spelling of 66265121455 in words is "sixty-six billion, two hundred sixty-five million, one hundred twenty-one thousand, four hundred fifty-five".