63639400667 has 8 divisors (see below), whose sum is σ = 64593655872. Its totient is φ = 62685275400.

The previous prime is 63639400633. The next prime is 63639400723. The reversal of 63639400667 is 76600493636.

63639400667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63639400667 - 2¹⁶ = 63639335131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63639406667) 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, 1472192 + ... + 1514802.

It is an arithmetic number, because the mean of its divisors is an integer number (8074206984).

Almost surely, 2^63639400667 is an apocalyptic number.

63639400667 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

63639400667 is a deficient number, since it is larger than the sum of its proper divisors (954255205).

63639400667 is a wasteful number, since it uses less digits than its factorization.

63639400667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64969.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 63639400667 in words is "sixty-three billion, six hundred thirty-nine million, four hundred thousand, six hundred sixty-seven".