661234063 has 8 divisors (see below), whose sum is σ = 768504960. Its totient is φ = 557165400.

The previous prime is 661234043. The next prime is 661234081. The reversal of 661234063 is 360432166.

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 661234063 - 2¹⁷ = 661102991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661234043) 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, 800113 + ... + 800938.

It is an arithmetic number, because the mean of its divisors is an integer number (96063120).

Almost surely, 2^661234063 is an apocalyptic number.

661234063 is a deficient number, since it is larger than the sum of its proper divisors (107270897).

661234063 is a wasteful number, since it uses less digits than its factorization.

661234063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601117.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 661234063 is about 25714.4718592469. The cubic root of 661234063 is about 871.2010816439.

The spelling of 661234063 in words is "six hundred sixty-one million, two hundred thirty-four thousand, sixty-three".