66351464 has 8 divisors (see below), whose sum is σ = 124409010. Its totient is φ = 33175728.

The previous prime is 66351463. The next prime is 66351473. The reversal of 66351464 is 46415366.

It can be written as a sum of positive squares in only one way, i.e., 63075364 + 3276100 = 7942^2 + 1810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66351463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4146959 + ... + 4146974.

Almost surely, 2^66351464 is an apocalyptic number.

It is an amenable number.

66351464 is a deficient number, since it is larger than the sum of its proper divisors (58057546).

66351464 is a wasteful number, since it uses less digits than its factorization.

66351464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8293939 (or 8293935 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 66351464 is about 8145.6407973836. The cubic root of 66351464 is about 404.8400811495.

The spelling of 66351464 in words is "sixty-six million, three hundred fifty-one thousand, four hundred sixty-four".