663061357431 has 32 divisors (see below), whose sum is σ = 1108566547200. Its totient is φ = 387998281440.

The previous prime is 663061357429. The next prime is 663061357481. The reversal of 663061357431 is 134753160366.

663061357431 is a `hidden beast` number, since 6 + 6 + 30 + 6 + 13 + 574 + 31 = 666.

663061357431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 663061357431 - 2¹ = 663061357429 is a prime.

It is a super-2 number, since 2×663061357431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663061357411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38483281 + ... + 38500506.

It is an arithmetic number, because the mean of its divisors is an integer number (34642704600).

Almost surely, 2^663061357431 is an apocalyptic number.

663061357431 is a deficient number, since it is larger than the sum of its proper divisors (445505189769).

663061357431 is a wasteful number, since it uses less digits than its factorization.

663061357431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76983836 (or 76983830 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 663061357431 in words is "six hundred sixty-three billion, sixty-one million, three hundred fifty-seven thousand, four hundred thirty-one".