66554357 has 8 divisors (see below), whose sum is σ = 68487552. Its totient is φ = 64636000.

The previous prime is 66554347. The next prime is 66554381. The reversal of 66554357 is 75345566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66554357 - 2¹⁴ = 66537973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554347) 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, 5732 + ... + 12882.

It is an arithmetic number, because the mean of its divisors is an integer number (8560944).

Almost surely, 2^66554357 is an apocalyptic number.

It is an amenable number.

66554357 is a deficient number, since it is larger than the sum of its proper divisors (1933195).

66554357 is a wasteful number, since it uses less digits than its factorization.

66554357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419.

The product of its digits is 378000, while the sum is 41.

The square root of 66554357 is about 8158.0853758710. The cubic root of 66554357 is about 405.2523083628.

The spelling of 66554357 in words is "sixty-six million, five hundred fifty-four thousand, three hundred fifty-seven".