61454500010066 has 4 divisors (see below), whose sum is σ = 92181750015102. Its totient is φ = 30727250005032.

The previous prime is 61454500010063. The next prime is 61454500010117. The reversal of 61454500010066 is 66001000545416.

It is a happy number.

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., 51610876133041 + 9843623877025 = 7184071^2 + 3137455^2 .

It is not an unprimeable number, because it can be changed into a prime (61454500010063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15363625002515 + ... + 15363625002518.

Almost surely, 2^{61454500010066} is an apocalyptic number.

61454500010066 is a deficient number, since it is larger than the sum of its proper divisors (30727250005036).

61454500010066 is a wasteful number, since it uses less digits than its factorization.

61454500010066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30727250005035.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 61454500010066 in words is "sixty-one trillion, four hundred fifty-four billion, five hundred million, ten thousand, sixty-six".