66261054 has 16 divisors (see below), whose sum is σ = 132993792. Its totient is φ = 22008408.

The previous prime is 66261029. The next prime is 66261059. The reversal of 66261054 is 45016266.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66261059) 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, 17814 + ... + 21209.

It is an arithmetic number, because the mean of its divisors is an integer number (8312112).

Almost surely, 2^66261054 is an apocalyptic number.

66261054 is an abundant number, since it is smaller than the sum of its proper divisors (66732738).

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

66261054 is a wasteful number, since it uses less digits than its factorization.

66261054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39311.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66261054 is about 8140.0893115494. The cubic root of 66261054 is about 404.6561202315.

It can be divided in two parts, 662 and 61054, that added together give a palindrome (61716).

The spelling of 66261054 in words is "sixty-six million, two hundred sixty-one thousand, fifty-four".