66662054 has 4 divisors (see below), whose sum is σ = 99993084. Its totient is φ = 33331026.

The previous prime is 66662053. The next prime is 66662069. The reversal of 66662054 is 45026666.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66662053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16665512 + ... + 16665515.

It is an arithmetic number, because the mean of its divisors is an integer number (24998271).

Almost surely, 2^66662054 is an apocalyptic number.

66662054 is a deficient number, since it is larger than the sum of its proper divisors (33331030).

66662054 is a wasteful number, since it uses less digits than its factorization.

66662054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33331029.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66662054 is about 8164.6833373989. The cubic root of 66662054 is about 405.4707810991.

The spelling of 66662054 in words is "sixty-six million, six hundred sixty-two thousand, fifty-four".