662156554 has 4 divisors (see below), whose sum is σ = 993234834. Its totient is φ = 331078276.

The previous prime is 662156531. The next prime is 662156569. The reversal of 662156554 is 455651266.

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

It can be written as a sum of positive squares in only one way, i.e., 476243329 + 185913225 = 21823^2 + 13635^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165539137 + ... + 165539140.

Almost surely, 2^662156554 is an apocalyptic number.

662156554 is a deficient number, since it is larger than the sum of its proper divisors (331078280).

662156554 is a wasteful number, since it uses less digits than its factorization.

662156554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331078279.

The product of its digits is 216000, while the sum is 40.

The square root of 662156554 is about 25732.4028026922. The cubic root of 662156554 is about 871.6060324041.

The spelling of 662156554 in words is "six hundred sixty-two million, one hundred fifty-six thousand, five hundred fifty-four".